You can take intro courses in both areas of interest, as long as they are mainstream enough to be offered at community college. You can do a psych AA and take electives in your other area of interest, or vice versa if there’s a major offered in the other subject. Just be aware that there’s a limit to how many “extra” classes beyond the AA requirements you can transfer. At a semester school, you need 60 credits for the AA, and the max you can transfer is 70 credits… so that’s three additional classes at the most.
The other thing you can do is take UC or CSU classes in the summers when enrollment is open, in addition to your CC GE and major-subject classes.