IME, my year at community college was not much different than HS. People joke and call the CC here 13th grade. It's not like HS in a lot of ways (less idiots and BS), and the professors are more likely to be less forgiving than your average HS teacher, but the classes I had were all cool (calc, physics, chem) and the instructors were all nice and friends with each other.
If you can get the information for the books you'll need, do it, and use addall.com to find the best places online to buy them. Many of mine usually come from Amazon. I tend to just pay a few bucks extra and get the expedited shipping. I've gotten most books with that shipping from California to nowhere in Michigan in a few days. Even the regular shipping is normally good, but can be bad. I waited like two weeks for the first book I ever ordered online, but the rest were quite quick. I found books at CC to be just as expensive as university, but at CC I didn't have the book information available to me. At univ, everything is online, so it just reads my schedule and gives me what books I need, the ISBN, bookstore prices, and if it is required or not. See if you can get this information, as you can pay as little as $100/semester online for all the books you need versus god knows how much at the bookstore.
In short, don't be nervous or expect it to be all that different. Just enjoy it, do well, and be open to meeting others. I met a few people at CC who were cool and still talk to them today, 4 years later.
As far as the "dorm experience" at university, I'm not sure I agree with it being a necessity and best times ever like many say it is. Like the other person said, the dorms are often filled with loud idiots, people who play Wow or CS constantly, and people who think everyone wants to hear their ***** emo, boombastic rap, or nu-metal blasting all day. The freshman dorms are especially bad. I'm not sure if I acted like that back then... sure hope not.