Highly Recommend Full years of:
Gen Bio
Gen Chem
Physics
O-Chem
Biochem (1 semester)
I would do all 5 of these as you need them anyways and that's the best way to learn them.
Psych and Soc are 100% optional. Never took a psych class in my life and scored upper 90s percentile. Took a sociology class and there was almost no overlap with MCAT sociology.
A simple review book for the psych/soc is my recommendation even with no background, however I wouldn't take the MCAT until all hard sciences are taken in class. (You may be able to skim by without Ochem 2 since there are so few Ochem questions overall and few 2nd semester topics)