1. If you get accommodations from your disabilities services office, then by law the professor must allow them. And they usually have office hours when they will help you out.
2. At college you won't meet people unless you make the effort. Aside from the rare group project, there aren't many opportunities to meet people. If you want to make friends than you have to be more proactive. Most schools have plenty of clubs. These are a great way to meet people, because you all have a common goal and interest. It's like having an automatic group of friends.
3. I'm not sure about a community college, but at my school there are very few if any annoy students in any of my classes.
PM me if you have any more questions, I've managed to do handle college pretty well after 1 year.