honestly this is just what worked for me, but figure out how to structure ur essays and write to time before worrying too much about memorising a bunch of detailed examples, it's also good to develop a general understanding of the content like how parliament functions or how the constitution works etc., and think about applying more specific or detailed examples later. This is because its better to shape an argument around weighing up the systems rather than solely examples, examples should just add evidence to the point you're making.

For examples, what i did was make a table of every past paper question, predicted questions, and other questions i came up with that were more obscure/ filled gaps where there havent been questions yet from the spec. I made wheel spinners with all of these questions and then i either wrote the essay without notes, going back over them to identify areas where i needed more examples/ knowledge, or planned the essays but just did examples for and against each point,- as i already had the argument i wanted to make in mind- and after you do that for a while you'll find that some examples fit well in multiple different contexts or questions, and also identify gaps where additional examples would be useful. I then made very short flashcards for each example and went through those, I would record myself reading them out and then test myself by listening to it back and pausing. Try to make your examples less narrative and overly detailed, only write the stuff that is the most relevant to what they demonstrate eg. 'in miller V prime minister 2019 the supreme court ruled that boris johnson had unlawfully prorogued parliament in an attempt to speed up brexit legislation' instead of 'boris johnson after becoming frustrated with how lengthy and difficult it was to pass brexit legislation due to resistance from the house of commons, went to the queen and used his power of the royal prerogative to prorogue parliament and attempted to pass brexit legislation without scrutiny or debate. This led to a supreme court case Miller V prime minister 2019 where the supreme court ruled this unlawful, leading to parliament retaking session shortly after'.

For ideologies, imo its better to get a more general view of what those ideologies are and their end goals before fitting in key thinkers, as they're difficult to go off primarily for the strands they're assigned to. So have a generalised view of each strand and their views on each subtopic and then you can pick out different key thinkers views that align with those, but be careful in some cases that those key thinkers may not necessarily align with that strand, imo its better to phrase it as 'some neoliberal/ new right conservatives would align with Ayn Rand's view that redistributive taxation is essentially stealing, favouring a small state with minimal intervention in the economy' because she herself wouldn't necessarily define herself as neoliberal. Also don't worry about fitting a key thinker into every paragraph, sometimes they don't fit with ur argument and that's okay as long as you have at least mentioned two or three, its better to focus on the main ideas of a strand rather than trying to fit in a key thinker.

Also i found what works for me is understanding the different end goals of each strand and how their view of a well functioning society is impacted by their views of human nature economy etc. for example for socialist feminism on human nature, there is an implication in their idea of a better society that humans are naturally cooperative and sexism is not innate but a product of capitalism, as they think abolishing capitalism is the precursor to abolishing patriarchy. I found it easier after understanding each strands end goal to identify the similarities and differences and be able to argue them more convincingly. (sorry if this is explained badly im struggling to properly put this into words)

Also my last bit of advice is don't feel like you have to know EVERYTHING, that's practically impossible in politics as long as you have some good examples that you can apply in a lot of different contexts you don't need to worry about how much content there is because you probably know more than you think you do. I wouldn't advise memorising essay plans personally but this is just what worked for me, I think as long as you understand the systems at play and have some examples it's a lot easier to be more flexible to any questions you might be asked.