I have a question about my major!!!?

I plan on going to film school for screenwriting. Now, I know how hard it is to become a screenwriter and to sell your screenplays and stuff but I'm already working on a couple and I'm still a junior in hs. Anyway, if I graduate and cant get an internship anywhere because of the difficulty and population of writers, what other companies would hire a screenwriter? My dream is to one day work for Universal. Don't laugh either and don't make rude remarks because I don not give a hell what you think about my career.