USAF college question?

I'm thinking about having the air force pay for college and I want to be either a law major or a political science major but then I will have probably 5 years to serve in the USAF and is it possible for me to become a pilot and possibly a fighter pilot to serve those years out and if I were to what kind of grades would I need in high school and are there any options besides ROTC? Thanks alot guys:) btw I'm a guy and I'm 16