Depends on what you want to do, is the short answer.
The rest of this post is a short motivation followed by a longer but still partial answer*. On Saturday I read an article on that day’s coronation of Charles III, written by an A-level student already worrying about her exams. Students worrying about exams always makes me a bit sad. I like to see students working at learning physics – it was a pleasure to teach a computational physics class last week – but thinking about students hunched over books or laptops revising makes me a bit sad. This raises the question: Is this revision a necessary evil or an unnecessary burden on young people who could be doing more fun and more useful things with their young lives.