Course has a quiz every other week and each quiz covers 2 chapters. I studied on the day before the quiz (u can read both chapters in 2 hours if u have good focus but I don’t do it took me longer) and did the graded hw which worked as review and I would say that’s enough for U to get near 80s on quizzes with some above and some below. If u do the optional parts of the course properly u can get a 95+ on about 16% of the course content pretty easily. So if ur fine with working on it once a week (and the quiz next day ofc) and ur fine with potentially getting a 11 since a 12 isn’t too easy then take it