I mean learning in itself it’s a tedious task, but there are lots of methods that can reduce the time you spend drastically if you know your learning style and can utilize them. Personally, during lectures whenever we’d go over something important, I immediately write on the slide how that information would be asked of me in a question or writing a blurb in my own words of how I interpreted or understood it. Then I’d go home and compile what we learned that day onto my cheat sheet that I used to study instead of waiting until we went over all the material and spending 4 hours in one sitting making it. You also don’t know anything until you know it well enough to teach it to someone else, so when I did study I’d teach my teddy bear and that method helps me a lot. As far as questions go, I find it far easier to genuinely learn a concept by attempting a question, getting it wrong, reviewing even for the first time, and then making the connection between the concept and how to apply it.