You should have tried harder to remember your math, because if you had, you could have placed higher and taken Statistics a semester earlier, and you'd be done already. That being said, well done on being awesome in English, because you placed into a 200 level on that one. Don't worry about socializing or looking like the odd man out; most of the people there are adults returning to get a brush up on their education and don't care about a freshman, and the others are freshmen who are too busy with their own studies. The work isn't that much harder and the teacher's aren't scary. Breathe, focus on the work, and don't buy the wrong book by accident. Seriously; you do need to pay attention when buying your books. Keep all receipts when you return the books too. And hey! You have the Lake Country Theatre Company nearby AND you get theatre classes, so you still get to act. And, hey, kid; don't panic that you won't see your high school friends again. You'll see more of them than you thought.
My senior year was a disaster. I stopped caring about school and homework, ditched class almost every day, and just couldn't wait to turn 18. My grades plummeted and I even left my graduation early, despite having a B average before senior year. In a perfect hypothetical time-travel situation, I would be able to follow myself around my whole senior year, making sure I went to every class and fulfilled my potential while I still had the chance to create good scholastic habits, rather than destructive ones. I would tell myself that this habit of procrastination and laziness would not end when I got into my dream school (which I did). I would tell myself how I would screw up in another state at a school I loved. "Do you really want to move back to your mom's house? Do you?! ...that's what I thought. Now just turn off the car and go back to class. Algebra isn't that bad, I promise. You'll be thanking me when we get all our math classes done in the first two years."
I wish I could tell my high school senior self not to rush into college until I have a perfectly clear vision for what skills I needed to learn! For many people, life after high school is a time of self-discovery. I was not self-actualized upon high school graduation; I had yet to discover who I was and how I could best serve the world. However, I was all too happy to accept "College Student" as my personal identity and my pigeon-hole. I had no focus. I based my major on the classes I thought were fun and interesting as a freshman, and I ended up dropping out of college as a Junior because I didn't see a point to my major. If I could do it all over again, I would have tried to gain some life experience. I didn't truly appreciate what kind of rigorous endeavor Higher Learning is supposed to be, and I certainly didn't understand my own mind, study habits, or spirit.
If I could talk to myself as a high school senior I would give the advice I have followed all these years. That is, follow your dreams and be satisfied at every turn. I would advise not to rush into college. Allow time to explore who you really are with out all the pressure of school. I would say to take time to see other countries, speak a foreign language and understand other cultures. I would advise to gain employment in an arena that focuses on your passion for life and avoid the practical reality of financial obligations. Go to college when you've let go of your restlessness and are ready to become a mature, focused student.
I woud tell myself to work as hard and learn as much as i can because it pays off in college.