Try here, there’s some suggestions people make. https://forum.choiceofgames.com/t/creative-writing-help.
You’ll find some assistance just googling on your own too. I did enjoy Jason’s post
I disagree that a direct writing style is useless for storytelling though.
My advice is write, just write, it doesn’t matter the quality on the first draft, just write your story.Get something finished, you can polish it up later. The more you write the better you’ll get at it too. And don’t over-think things.
There are people writing games in choicescript who aren’t the best writers, but they have other areas where they excel which I admire every bit as much.