High School/College plan feedback ???

I’m planning to graduate from high school early and go to a community college. However I need a bit of guidance because I don’t know if what I’m about to do is realistic.
So order to receive my credits for my high school diploma, I need to take classes at a community college. They’re a semester system. I’m currently taking classes for Spring and plan to take a few summer sessions. After I receive my diploma, I was thinking about transferring to a school with a quarter system because most UC’s are a quarter system and I don’t want to not be unprepared for that transition.
My main goal with this whole thing is to finish my GE’s and transfer out to a university the same time my high school class graduates. So with that being said, I only have a year. Do you think if I take 5 classes per quarter that will be too much? Also, I’m planning to take CLEP exams to cover my language requirements. I feel as though it’d be easy to handle because I’m used to the work load as a high school student, but at the same time I don’t want to jump into something I have no idea about. Thank you.