Pretty easy to get on campus housing in general, however don’t count on getting your first priority picks. Returning students chose their dorm rooms back in November so there’s not that many openings in each dorm for transfers. Housing staff will do their best to put you in a preferred dorm or apartment. They also try to match you with roommates that are also transfers.
I will say that if there is a returning student who does not have a roommate, you will automatically be assigned to their room if you join their roommate group in the housing portal. So if you can find a returning student who lives in Carmichael or Rams village who is looking for a roommate, that would guarantee you a spot in one of those two if you joined their roommate group. @90smix