*Jealous!*
Well, everyone is in the same boat, everyone will be disoriented, so enjoy it. If you live on campus, you'll end up with friends no matter what you do, it is impossible to stay isolated living on campus. If you commute, you'll have class friends as per normal, it's just not a big deal. So many people in the same situation, your age, all with freedom, it's a crazy year. Just don't do too risky of stuff so you can live to tell the tale
My advice is to do as much as you can handle in terms of both social, and getting to know the professors in your major, and other students in your major. Do stuff with people, join some groups that do/like similar things. Introvert doesn't matter, half the population is anyway, just be active and make the effort to be around...that's typically more than enough. Especially being a gal, with a sense of humor. I'm an introvert, but I don't care, I do stuff anyway.
For math, you can probably find a math lab that you can do homework in that has people to help, etc., if that becomes an issue. Math was the only class that I found that you really had to do all the work, all the problems, and study hard with. Most other classes were a lot of reading and just remembering facts in some cases. If you haven't already, read up on maybe a half dozen good memory techniques for different needs, and try to get good with them. It can make those memory classes easier.
You may also start to learn which professors are good and which are terrible, use that info to guide your later schedules. I had some good teachers that had small classes (English), and it was like a little family, the professor would take us to pizza sometimes, good times.
Don't get crazy with it, but have a cup of coffee right before math or a test. See what you think. Don't get use to drinking 3-4 cups a day, that's bad for you and it won't be effective anyway. Limit it, but do it when you need it. I learned this at 30, I'm that late of a bloomer. Math and programming take a lot of abstract mental effort, it's complex. It's like a turbo booster, just don't go beyond caffeine, and keep the dose low. I feel like a pusher...but this is what I'd tell me today if I were going. Programmers live by coffee, it's no joke. It's not a coincidence their taglines are often something like : Joe Smith, Converts Coffee into Code.
Have fun, do stuff, don't regret coasting through it! And tell us something once a month or something, need to live vicariously