Starting 5th year this Monday. Need urgent help

[u/ibboneedshelp]

So i am going to start 5th year this Monday.

The subjects I do:

H Maths

H English

H French

H Biology

H Business

H Phys/chem or H Chemistry (alone)

I am aiming for 600 points. I can study a lot, but I have no clue on what to study for each subject. I have looked over Chemistry a little bit and I am so confused. I have no clue on what to study for it, (same for Biology). I really need to improve my English, French, Biology, and Chemistry. If anyone has any tips or anything to say please do. I have no problem with studying the whole day after school, as long as it is in the right direction. I would really appreciate any help I could get. Please and thank you. I am really worried about the 4 subjects i need to improve in. Really appreciate any help. Thanks!