I tried very very hard to act like a complete normie and mask my neurodivergence. For years.
I'd study how they talked and acted (mannerisms, body language, etc). I'd try to act similar, I'd watch normie shows, listen to normie music, try to appear as cool and laid-back as possible. Here's the thing though - it didn't work. Not exactly, I'd say. I was treated better, but I was still kept at an arm's lenght. Something I didn't want to admit to myself is, normies can actually tell when you're just pretending and masking. They absolutely can. So...yeah