How to study?

Ok, so far life hasn’t been too bad. Going to all the lectures, taking notes during class, and being on top of hw. Now what? I’ve sorta only been copying off the teacher notes and completing hw in advance. But I have no clue how to study, I’m thinking of copying my notes from teacher lecture to a notebook into my own words. Should I read the textbook? Or do practice problem or watch a YouTube video? Btw I’m a business student, yes our work isn’t hard yet.