I’ll just warn you now, this is really long.
There’s one major issue I have plot/world wise. The story starts off with:
"In the eyes of the gods all people are equal, man or woman, they are judged not based on gender but on actions. "
But then it goes on to say:
“In Henlan men have often suggested that the most glorious death to die is one where you are flanked by your brothers with a weapon in hand. Merchants and Miklamen tell tales of a long dead nation where only people who died in two ways were given gravestones. Men who had died in battle and women who had died in childbirth.”
This suggests that men are exclusively the warriors, and that the most respected men are war heroes and the most respected women are child bearers.
“…to birth sons to carry on our husbands lines and daughters to watch grow up into beautiful wives of strong men.”
The story states that men and women are equal, but the way the world is described it is very patriarchal, especially since women are not considered legitimate heirs to the throne, with Alexia, the eldest living legitimate child, having to compete for the throne against male relatives and an illegitimate brother.
“Having done it eight times herself and delivering seven healthy children in total. If one of the three of her sons had lived past the age of fourteen maybe this war could have been avoided.”
If people were truly judged by their actions and not their gender, why is it that any of the three deceased sons would have been considered eligible to rule, but all four of the living daughters are not? Since Alexia herself is a candidate for the throne and is leading an army in order to win it, it can be assumed she has about the same skill and drive to rule as any of the other three male candidates. But because she is female, she has to fight for her right to rule instead of automatically being considered next in line.
It’s perfectly fine for the story to take place in a patriarchal world, just don’t preface it with men and women are equal. And if you do plan on having gender be a choice, you’ll have to take in to account whether you’ll want to gender flip the world like in Choice of Broadsides, or write a different path for each gender since each will be facing different obstacles and have different opportunities. Or you can gender lock your story. Most people like being able to choose, but a lot of people will overlook it as long as it fits the story and the story is good.
Spelling, grammar, etc.
Just a suggestion, you might want to take out the word “serjeant” as I’m assuming you’re using it in terms of the feudal system, but it’s an obscure word that can be mistaken as a misspelling of the word “sergeant”.
You also use the Old English form for syr and hore, and they really stand out and take away from the immersion, at least for me, especially since you unnecessarily capitalized hore.
She didn’t want to identify herself as a former Hore to a stranger.
Several of the Hores in his service had given birth to children in this room before
You may think Old English fits the tone of your world better, but since you use it so infrequently, and for the sake of consistency and clarity, just stick with standard English. For the most part they just look like spelling errors.
When writing numbers, make sure the way you write them is consistent. The first time, you used hyphens to describe the age of your father and Jon the Younger as two-and-twenty. The second time, you didn’t use them when Leif One-Eye was saying he’s seen five and forty winters.
Before you choose your father’s name you refer to him as “your father”, but afterwards you refer to him as the name you chose. It makes the story jump from second to third person. Then when the King/Queen you chose tells him to kneel you refer to him as “your father” again and the perspective jumps back to second. It’s a bit jarring as a reader. You can use the father’s name when characters are speaking, but please try to keep the narrative in second person.
Choosing snowy weather gives you an odd spacing after “Standing near the door your father shook the snow off his furs”
Even if you choose that the weather is perfect, Leif One-Eye still complains about having “no reprieve from this weather.” And before the weather is chosen it says:
Making the morale issue even worse was the weather.
Why/how would perfect weather negatively affect morale? And after choosing perfect weather it says:
Which was what made it even worse.
The fact that there’s supposed to be a celebration is what’s making it worse, not the weather. If there wasn’t a war going on, I’m assuming the celebration would happen regardless of the weather. So perfect weather being bad doesn’t really make sense in any scenario. You should probably just take out the perfect weather option. In fact, if the type of weather doesn’t have any major effect, you could probably just take out that choice entirely.
One of the guards on duty ran to her calling “Woman are you alright?”
I know you probably don’t mean for it to sound derogatory, but it kinda does. Maybe you can switch out “woman” for “madam” or something more along those lines?
When choosing your mother’s occupation/background just have “I am” instead of “I am a” since you already have the a/an/etc in the choices.
This is when choosing arrowsmith for your mother’s occupation/background:
To my father Amr, on the Street of Hammers. Please help me my baby is coming." [mother] lied.
You’re missing a quotation mark, and probably should have “Take me to my father…” since the guard only asked if she was alright, then she said her name and it doesn’t make sense to continue with “To my father…” immediately after that. And I have to wonder, what exactly is she lying about here? Is that not her father, and where he lives? Is not her baby coming? You should probably just use said. If she said something along the lines of, “Take me to my father whom I work for…” then you could use lied.
This is when choosing handmaiden for your mother’s occupation/background:
He didn’t think it was proper to bring her up to the Dowager Queen, yet the Dowager Queen was also the only person it seemed proper to bring her to.
He didn’t think of/couldn’t take her to a midwife? The Dowager Queen is literally the only person capable of handling births in the entire city? Even if your mother is friendly with her, how is a random guard supposed to know that and figure that taking her to the Dowager Queen is the best option for getting her help?
These next ones will be sentences that need a bit touching up, I put my edits in parentheses:
It had gotten to the point that with two kings left(,) a large portion of the common folk in the army were discussing disserting.
…earning the friendship of many heirs to key (h)ouses and (t)itles.
Your father (entered) the guard tower
There were some thirty odd men in (the) guard tower…
And never have I been treated so (poor) as {candidate} has treated us.
Let {candidate} fight Rurik by (them)self! (Ignore this if that’s just the way Leif talks)
Because {candidate} deserves to be the {King/Queen} (and) they’d be good at it.
(Also, are all the candidates addressed with the royal we? Or did you just not want to code for pronouns? 
)
True to his (name) the man lacked his left eye (Using SAT words like sobriquet throws off the immersion since most people will have to pause to figure out what it means through context, or the dictionary if they’re dedicated enough.)
I’d (ken?) most o’ us know your face, but few your name. (I understand what he means, but “ken” tripped me up. If you could tweak it a bit for clarity that’d be awesome!)
I had to sell the last of my herd when this all started. (Because) I know that when this is all done (This is for the father being a Drover; if the original is just how he talks, you can ignore this.)
If any of you would dare give (their) lives
Your father (rose,) face still red
She did try to continue her (nightly) walks (through) the city(.) (T)here was something beautiful about the city at night even though(delete the comma) {weather}. (having “the city at night” twice in a row was repetitive)
There were guards at each of the five gates (delete “in”), each (outfitted with) (delete “in the”) sturdy iron armor. (Any weapons?)
She loved your father dearly and did not know (delete “what she”) how she could bear the world without him.
if something were to happen to her or to their child he would be (delete “a”) crushed (delete “man”). (Suggestion: replace crushed with devastated)
The Dowager Queen sat and talked to Lady Car reliving (some) stories of the past few years.
all of her ladies-in-waiting having reached the age where (their) fathers had married them off
(During your mother’s) pregnancy(,) the Dowager Queen had kept her employed paying her (to) sit and talk with her, as well as teaching her how to read (delete “slightly”). (So the Dowager Queen paid your mother to just sit and talk with her? You should probably add something to clarify if this is because either the D.Q. has no one else to talk to and is desperate for companionship, it’s a random act of charity and your mother won the lottery, or your mother was a loyal handmaiden before but was unable to perform her normal handmaiden duties while pregnant so the D.Q. changed her duties to just being a companion because otherwise she would’ve been fired or something?)
Stats Screen
I’m guessing the “of” is where your name will be; I’d suggest changing it to “Unknown of Unknown” so that there’s a framework for the name instead of just a floating “of”.
And Health should be a line down.
Script Errors
Choosing Sten as father’s last name - startup line 297: non-existent variable ‘mastermason’
Choosing mother’s occupation as Thrall - startup line 421: non-existent command ‘set_mother’
And we’re done! Hooray! Did you stay with me through all that? 
Seriously, good luck with chipping away at this story; based on what you’ve said so far it looks like it’s going to be a massive project. Don’t be afraid to narrow the choices or be linear at times, you don’t want to end up getting overwhelmed at the prospect of infinite paths.
I live in a place where the weather can be rather bipolar and all that weather can take place in a single season. Instead of listing specific weather, maybe you could say spring weather, summer weather, etc.