ADVICE NEEDED! How long to spend on content review for a specific subject before moving on?

Hey all I had a question. During content review, most of the guides (SN2, etc.) tell you to spend a day reading or getting content down for a specific chapter and then reviewing it in the future. I've been having a hard time with this. I feel like I barely get the material down and then move on and when I come back to it, I've forgotten what I learned.
I'm a non trad and have to learn most of these subjects from scratch (namely bio, psych soc and gen chem)
My question is, would it be better...

ADVICE NEEDED! How long to spend on content review for a specific subject before moving on?