>>>>>> What are my chances of going to a good medical school if I stay at CPP? <<<<<
The question should be, "what are my chances of going to a medical school if I stay at CPP."
Your question suggests that some med schools in the US aren't "good". They are ALL very good. The US doesn't have any "so so" med schools. They are all worth attending and all are respected.
You didn't say that the SOM had to be in Calif, so that's good. As mentioned above, the competition to get into a Calif UC med school is unbelievable. If you do stick with your med school plans AND have the stats to apply, then keep an open mind and apply to privates that are OOS.
Right now, NO ONE can tell you what your chances are. We don't know anything about you (grades/test scores), we don't know how you'll do in the premed prereqs, we don't know what kind of ECs you'll do.
The truth is that most freshmen premeds never end up applying to med school. After the first year of Bio and Chem, a large number change their minds. Then after Ochem, more kids change their minds. Then after taking the MCAT, more kids change their minds.