And that would apply to all writing and characterization. Don’t take your first draft too seriously.
I believe characterization is everything in fiction. Seeing your characters come to life is what keeps you and your readers glued to the story.
So once your initial draft is done, I’d recommend going over it however many times it takes . . . editing/adjusting/adding/subtracting . . . until you can read the whole thing aloud and be happy with it. It’s during that process that you’ll really come to know your characters.
A character that’s most unlike you can be the most fun to write. I say push the boundaries. Freely explore exactly what makes you uncomfortable. Practice naturally building tension between your character’s ways and your own point of view. That natural tension can serve your story incredibly well.