Self Service has the grades for your classes, it allows you to register for classes and things like that. You'll get papers soon that tell you how to logon to self service and what it is. I am sponsored. The contract says maintain a 2.0 GPA to be considered. You'll get the contract when you get...
You will probably take Calculus when you get here. Talk to the advisor about getting into Intro to Physics and Chemistry. You can talk to the advisor about switching out. He didn't let me do that this year and it showed in my grades. If he doesn't you can use something called Self Service once...
They have a little bit of exams. The tests I took were not used in my course selection this year. I wish they were because I was unprepared for a lot of the classes I took first semester. If you feel a class is too hard for you switch it regardless of what the prep advisor tells you.
You are allowed to go, but some SLA's (Squadron Leadership Advisors) make you get permission to study with people that aren't in your squadron during NSH. It's better to meet at the library.