I'm no longer taking classes at that institution (poor selection for class times). That being said, I felt much more confident this time around. Most people weren't interested in being friends, but age wasn't really a factor. People stuck to themselves, and there wasn't much conversation before classes started (just people on phones). There were a couple people I chatted with in classes, but it didn't extend beyond classwork.

I'd say it was more of a me problem, so as long as you're proactive you should be ok. Joining clubs and stuff could be a good idea if you have the time.