The main thing is to treat people politely and with respect.

If they greet you, greet them back. Chit chat a bit to show that you don't have a problem with them.

But if you want to only speak when spoken to, that's completely FINE, as long as you show people respect.

Be comfortable being who you are. If you're polite but quiet and people don't like you, honestly, they're the one with a disorder. And that's not your problem.