"Adults tend to pay their own way. And "adulthood" tends to begin sometime close to high school graduation."
My older daughter sometimes says "being an adult is lousy" (often using a more colorful word to mean "is lousy"). She is joking of course, but being an adult does bring some responsibilities which are not fun to deal with, such as figuring out how to pay your own way through life.
Two APs will be enough for most universities. If you want to go to Stanford or Harvard you pretty much need straight A+'s in many AP classes and some other major hook and a lot of luck. For "normal" very good universities two are fine.
Seriously, you should look for things that you want to do on campus. There will be a wide variety of activities. There will be LOTs of activities that you don't like, but there is bound to be something that you do like. Also, while quiet thoughtful introverted people might be a minority in most places, there will be relatively more of them on a university campus than in most other parts of society. Seek out other quiet thoughtful introverted people to spend time with.
Also, understand that it takes time to settle in to a new location, but you will get there.