How to revise alevel physics (edexcel)

I need to get an A to meet my offer and i’ve done all the paper 1 past papers but im consistently getting marks within the 40s. Half of the time i don’t understand what the questions asking or what i’m meant to see from the diagram. The other half I don’t get what diagram im meant to draw. I’ve gone through the whole seneca and textbook but i literally can’t find any good resources and i’m getting to fustrated doing past papers because the questions make no sense.