Honestly, as one of those people who never studied or even did homework and basically got grades entirely a linear function of my interest in listening to the class without making any notes, I've thought for a while that I should just look up how organized, hard working people actually do anything, because it's predictably come back to bite me in that I now can't really teach myself anything unless it's in lecture format and provides summaries because any notes I take are useless. Also I have like zero time-management ability and I don't even know how people get it.

This ^ Also, as someone else mentioned, use your own brain to think about how this particular method would work for you. Hell try it. Doesn't mean it works for everyone, or that someone else doesn't have another better method. But this is our area of interest as 'hackers' and hacking learning might be the format which better appeals to someone over another.

I also doubt many of these things are even true.

I was always surprised in lectures watching people divide their attention between actually listening and trying to write structured notes. Most of the time there's a book which was structured by a pro. Rather than re-reading your own notes which reify misunderstandings from the 1st encounter.

I don't know what textbooks you had but mine were generally enormous, hugely expensive, with average quality noted and explanations. The one that comes to mind immediately is https://www.pearson.com/uk/educators/higher-education-educat...

Meanwhile, sites like Paul's Math Notes and Khan academy are easier to digest, clearer explained, and much more available.