Learning Online and getting ahead

Is there any way I can sign up for online college classes (lower divisions), that are transferrable to a UC? Is there any way I can do it all online (without going to class at all, even for exams)? Is it too late? How about for the summer? I just want to learn independently and get ahead. I’m taking classes at a community college, but can’t overload on units, but I know I can handle it if I put my mind to it, so I was wondering if there’s a way to d it online (even taking exams online)? Thanks!