Congratulations!
For the Prep, you will report in the middle of July and there's 3 week basic. After that, you will start classes.
The first 10 days you take classes that are mostly for evaluation. The classes for the first quarter are pre-flight, Algebra, Trig and Chem. The second quarter is Eng, Algebra, Trig and Chem. There are two levels of classes for math and Eng, regular and honor. The third quarter starts after Christmas and this is when things change a little. You could keep the same four classes. 20 students are picked for Calc 141 at the academy, and in that case they drop one of the math classes (I believe Algebra). 40 students are picked for Physics (you drop the other math class). Some people are picked for both Calc and Physics, so their schedule is Calc, English, Physics and Chem. That's what my daughter is currently taking.
You will be told all of this at a briefing. They are really good at communicating with the Preppies so that you know what to expect before it happens. You won't be surprised with anything.
In terms of privileges, there are phases. At each phase, you gt more privileges. Right now, they are waiting to see when they will be allowed civvies. You can also earn overnight passes through school work, positions, military ranking, etc.
If you have specific questions, feel free to PM.