UCLA Psychobiology Summer Session?

Hi,
I’m from a transfer student from the Bay Area. I was wondering if I should start taking summer classes this 2015. I have done all the preparation courses for Psychobiology EXCEPT the Physics series. Should I take Physics 6A this summer? I’m pretty scared to take summer classes immediately because I came from a CC with semester sessions. Also, I don’t know where I would stay during the entire time since I’m from the Bay Area.