study sites recommendation needed

I DONT CARE HOW MUCH IT IS, as long as it's genuinely a good site to use, I'll pay whatever. I say that because I see that everything now is a subscription to get actual benefits from.

I'm going to use this for a year for MULTIPLE subjects, currently Psych 1102 for the CLEP, so I need memorization. But soon I'll need math, specifically calculus AB/BC and trig. I'll also be doing history and other small classes there. I just want to ace everything.

I was using this Quizlet set, and I went through 7 flashcards ( maybe more, but nowhere near a quarter of the set ) before it said I need Quizlet Plus. I don't mind paying for it, but I want to know if I should invest my money into that or something else. If there is an AI, I should also pay for it to help me.

I also need something to give me practice problems for my math classes ( This is the most difficult thing to find for some reason ) for my calc and trig classes, as well as the SAT.

No need for sites to help cram as I'm doing everything in a good, timely manner.