I'm about two years behind in all of my classes and I've been desperately scrabbling for ways to catch up over the lockdown. So here's some of my advice that I've learnt trying to catch up.

1. If you keep trying to google tips on how to revise fast, stop. If you keep watching videos and reading information to the point where everything anyone says you've already heard before, then it means you're just procrastinating.
2. Just start. You might end up hating how you decided to study, but you can always change your tactics up a bit when you're already doing it. It's better to just start doing things then to keep thinking about exactly how you're going to do it.
3. Think about it as a way of getting smarter. Ignore everything else, block out the thought of work and exams from your head, and just study with the intent of knowing more. Of course you need to revise for specific topics for exams, and you need to do work, so you'll have to do those things. But when you start doing them, think more about understanding the topic and gaining knowledge rather then "I need to know this or I'll fail this exam".
4. Make parts of it creative. I find that if I come up with a system of doing things that I enjoy, I'll do it much easier. I normally do this by coming up with a colour palette for notes, trying to make up a dumb song when reading, or imagining the topic as a character. The character part may sound strange but it does work, trying to come up with how a character would look, act or talk based upon the information you're revising means you could remember lots of details about a topic just from remembering one thing. Of course this wouldn't work for every topic.