How diffucult is it to make it to a big name school (UCLA, KU, Akron, USF)
I'm so glad you're thinking about colleges already. It honestly depends on the specific school to figure out exactly the GPA and SAT scores you will need to get in (the SAT, if you don't know, is a standardized test that colleges require for you to take in order to be accepted).
One possibility that you should think about if your GPA isn't as high as you'd like is to go to a community college for 2 years and then transfer to the school you really want to go to. Often community colleges in the same state as the school you want to transfer to will have an agreement so that if you achieve a certain GPA in community college you will be guaranteed admission to the 4-year university. This is also cost effective because community college is much less expensive than a traditional 4-year university. Good luck!