'How do I get an A* in A-level Chemistry?'. I used to ask myself the same but after having gotten an A* myself, I can assure you that it is doable and maybe not as hard as you thought.
PMT Practical questions: https://www.physicsandmathstutor.com/...
Chem revise: https://chemrevise.org/
0:00 - Intro
0:31 - It's not that difficult!
1:08 - Know ALL the content
1:22 - High Yield marks
2:27 - Maths questions
3:20 - Exam questions!!
4:06 - Resources
5:14 - Revision