I was that kid.
Going to a university in a city helped a lot with that. Long conversations about comic books with friends, going to the nearby comics store on new release day with lots of other nerds, etc.
I’m no longer convinced adding the Internet to that has been a net positive. Maybe if we could have froze its growth and development at some specific point…?
It helps before you get to university, and once you leave. The place you live for work may have very few people with similar interests.
Discord has done wonders for gaming shops keeping people connected and organizing in between weekly game sessions.
Meetup could be superceded by the hitch/tinder model to organize activities with individuals over scheduled events ran by organizers.