Hey!! I’d say youtube is a really good place to start then if you have nothing, literally just type in “AQA gcse history” and loads will come up, especially if you’re specific with the topic! Primrose Kitten on youtube has a lot of History stuff in structured videos, so you can go through and watch those and take notes while watching?
Also a bunch of playlists come up too, so it could be worth watching through them, aswell as revision videos, which are probably better to watch if you’ve only got 12 days to cover 3 years worth of content.
You’ll also have to revise what you’ve learnt too to actually remmeber for the exams, so what i would do is after i’d watched the video, say on Elizabethan England, i’d look at my notes for 5 minutes and then i’d put them away and just blurt and write down everything i remeber from those notes onto a whiteboard/a sheet of paper and once i’ve written everything i remember to back and add things i’ve missed in another colour looking at my notes so you can visually see what parts you need to work on. Exam questions would also be good, because it’s alright lesrning the content but you actually have to know how to apply it to the exam you’re doing in 12 days yknow? So make sure to practice those, they should just be past papers on the AQA website with mark schemes to mark them after
I hope that can be useful for you! (: