
i don't see why you Have to write someone neurotypical, then, or even think of it in those terms; neurotypical and neurodivergent aren't the two options of a binary but a spectrum as well. so—and not to be cliche—maybe just write the characters as characters first and then tweak them as you deem fit to best serve your story. if that means toning down some of qualities of theirs, then you start looking at it from that lens.
I literally have the same problem. I would suggest writing a list of things that a neurotypical person would not say or do, and once you are editing your page, look at the actions, behaviors, and quotes from your character and compare it to the list. If they are in conflict, take those things out and replace them with a secondary list: this list is of things a neurotypical person WOULD do and say. I hope this helps! If you find yourself stuck, I can help you write the two lists.
of course, this is very general advice so take it with a grain of salt, especially if your story is very much about the neurotypical character(s) BEING neurotypical, or maybe about how your neurodivergent character(s) interact with your more neurotypical character(s), and we're very much involved in their headspaces as readers. but even then 🤔