Hi famaz.
A Level Law is difficult to revise for, because so much of it is required learning of legal principles and accompanying case law.
I used to get my students to use A3 sheets of paper, writing a particular topic in the middle, and doing a mind map, using different colour pens, sticky notes of different colours, etc etc. There are several other ways, but this might be a good starting point for you.
It worked for those who were quite visual in their learning - colours help in sorting out eg mens rea and actus reus, and putting a key picture/emoji-type symbol alongside a case, the main points of which are bullet-pointed, can trigger recall. So, for example, an image of a bottle (or a worm!) alongside Donoghue v Stevenson can be helpful.
Then, I guess you have to sit down and try to ingest all of the information!