Chemistry GCSE early?

I am in Year 9 and I do tuition one day after school every week for science with some Year 11s. It's for GCSE but I do it bc I like the subject and I am a nerd. Anyway, my tutor said after we look over paper 2, I could do Chem early, like this year. Is there any point doing it now, and also things like quantitative chemistry and electrolysis have gone out of my head along with other parts of topics, so can I revise at least all of Paper 1 and part of Paper 2 by May (What do you recommend to revise?). It seems like a stretch so I thought I'd ask. Thanks for reading!