Disclaimer - I did AQA but it's the same ideologies I think? Conservatism, feminism, liberalism, socialism. I achieved an A* in my ideology paper.
We had summary tables in our textbooks (I'm sure other textbooks will have the same) which I learnt. It was roughly a one sentence summary but was helpful in differentiating between people of the same strand e.g Hobbes and burke.
I then did extra research around them (for AQA you absolutely HAVE to know context) - what did they do in their life, when did they live, what was going on etc. Made note of their books and memorised quotes on Quizlet.
I also made sections on the key ideas in strands and added in the key thinkers e.g pragmatism, tradition. I also had other thinker's not mentioned in the spec to add depth. E.g Greer, Chesterton, figes, smiles.
Example - Hobbes - english civil war, hence an advocate for absolute sovereignty. Leviathan - humans are needy and vulnerable and easily led astray, hence they need a strong authority to lead them.
Burke - french & american rev. Served as an MP during these time. Reflections on revolutions in france.
Hopefully this makes sense? From here I just memorised. Look at it. Look away. Repeat it. Get people to test you. Make flashcards. I even put it into translate and had it repeatedly read to me. Discuss with people. Use the quotes in your life when talking. Practice essays again and again. This is what I did to prep for my a level, sounds kinda crazy to channel your inner Marx on a random Tuesday but it worked.