Wolverine has a very similar storyline too, it straddles Fallout NV where he knows who he is for the most part. The Courier didn’t have amnesia per se either. If I’m remembering NV correctly as well. You had a quick recovery time and had a decent idea of who you were chasing.
Wolverine does know there’s a hole in his memory and is one of the big things that drives him and causes him to continue to be with Professor X.
The Bourne series does it as well. Jason has no idea who “he” is but retains the muscle memory and skills of his military/assassin training. Eventually, with time, he remembers everything.
So, as much as I hate using some tropes, your memory has holes in it too. The “how it got there and why” is something that you will be discovering in bits and pieces. The clues will be scattered throughout the chapters. Also, I need to say that some relationships will also be affected by your knowledge of yourself as well.