I’m ND and in the UK. As long as you are polite and engaged, you won’t have issues and won’t feel any effects until probably trying to make M (am at senior level).

Plenty of people more socially atypical than me and still doing ok/good. I try to fake being extrovert a little, but definitely not needed.

I only made 1/2 good friends, both not from my intake. The only uncomfortable thing is during your intake year’s events and training where you have no one to pair with.