Gcse english lit help

Personally, what worked for me was doing a bunch of plans for past paper questions. I'd do quite detailed plans including my main points, the quotes i want to use, context to add, and any specific things i know i want to include. I'd also sometimes make multiple different plans for the same question to help me think about the text deeper and get a better understanding of it. Personally, I think making plans is a better use of time than writing whole essays, although I did also write up a paragraph each from some of my plans to practice writing.
For remembering quotes what worked for me was blank page retrieval. I typed up all the quotes I wanted to learn from a specific text onto a word document. Then i opened a blank page and wrote out as many as I could remember. Then, I'd check it against my list and in a different colour add in any quotes I missed. I'd do this like once a week for each text and it helped me remember a lot of quotes. (although you really don't need that many I did go quite overboard)
Also, for the poetry you really don't need to know all the poems that well. I picked like 4 main ones to study that I was able to between them twist to fit any question and didn't spend much time on the rest- just enough to make sure I could write about it if it was the provided poem.
Hope this helps!