Is there even a chance of reaching for a University of California?

It depends on which UC you choose. Generally the top 4 UC's are a bit harder to get in, while the rest are pretty easy. If you live in-state (CA) then I think you have a better chance. Also, your GPA seems better than average. Be sure to do well on your SAT and participate in many extracurricular activities. It seems that you've already added some, so thats good. If you don't plan on going to a UC right after HS, and want to go to community college thats a good choice as well. You save money on the first two years while learning the same thing as those who are attending their 1st and 2nd years at UC's. I think you won't have a problem getting into a UC...maybe Merced or Riverside or SC. You'll do fine.