If you're doing AQA, I would recommend going through every exam paper (ideally 2018-2022 and specimen papers if you can find them) and planning your answers to them. Once you've done that, go through each topic and compile a list of exam questions they could ask. If you're struggling to come up with your own essay questions for any given topic, I'd recommend going onto Quizlet and typing up 'potential 9 markers/25 markers' for whichever paper you're doing. Even if the questions you have planned don't come up in your exams, you will have a wealth of knowledge to answer any question they decide to throw at you. You could even create exam question flashcards (q on the front, 3 examples and statistics for it on the back).
It's great that you've made notes, but politics essays don't require as much detail especially for paper 1 and 2. For example, for 9 markers all you need is a simple intro such as 'three forms of participation include voting, pressure groups and party membership'. After that, create 3 paragraphs including 2/3 pieces of relevant statistics and your analysis of them. For example, 'although only 61.4% of the electorate participated in 2005, this increased to 65.1% in 2010. Whilst this is lower than the 70s, this shows that electoral participation is steadily increasing'. If you're struggling to find examples, mark schemes are really helpful.
For statement 25 markers, do an intro and state whether you agree/disagree with the statement, 4 paragraphs (2 agreeing/ 2 disagreeing) and a conclusion that brings your argument together. For extract questions, you need to compare the arguments in the intro e.g. extract 1 says this but extract 2 says this and mention the provenance. For the main body of the essay, you should also write 4 paragraphs (extract 1 for the first paragraph and its contrast with extract 2 in the second etc) and then a conclusion. If you want to aim higher, you should mention specific MPs and perhaps a quote or two.
I would definitely make flashcards to remember statistics/quotes, but make sure that you're practising exam questions if you're aiming for top marks.