I did AQA A Level Chemistry and ended up with an A as my CAG (didn't do a levels coz of covid) last year so I'll just say what I did.
Essentially in my opinion, the best 2 ways to revise for chemistry are to answer exam questions and to watch YouTube videos. (actually that's wat I did for all my subjects)
I'd seriously recommend that you check out Eliot Rintoul on YouTube as his content is what got me through A Level Chemistry. For exams I'd watch his videos on the topics and then do exam questions on the topics as well. (Check out PMT for exam questions, it has a whole bunch of them).
If you have any other questions feel free to message me, or just continue speaking here. whatever you're comfortable with.