Welcome to the world of sailing! I can remember when I got my first sailboat not so long ago...:-) I have a Pearson 10M that is berthed in the Oakland Estuary.
The Bay is a great place to sail, you won't miss the open ocean. Coming out of the Berkeley marina, you are right into the Bay soon as you cross the breaker wall. Hope you have a good upwind slip. How big a slip do you have and how much are you paying? A bit of a long drive from Sac to Berkeley, eh? Off peak hrs you are still ok.
This is a great forum and lots of good, knowledgeable and helpful people aboard.