The most useful subject nobody teaches is how you personally learn best. Figure that out and everything gets easier.
CREATIVITY
CREATIVITY
Everyone gets taught the same way and nobody gets taught how their own head takes things in. Some people need to write it out, some need to say it to a person, some need to watch it done once first. Not knowing which you are means every subject costs more than it should. Once you know, it transfers to everything after.
Pay attention this week to the moment something finally clicks, and to what you happened to be doing at the time. Try that same method deliberately on the next hard thing. Two or three rounds of that teaches you more about studying than any advice will.
Under which conditions does studying finally click for you?
Free, with nothing to buy inside it.