Hi, sorry for the late reply! Just did my GCSEs so hope this helps 💜, for context, I got 9s in Lang and Lit
Language was a nightmare for me to start with. Tbh, my teacher was my best resource, use your teachers! Get them to mark your papers and give you feedback, read examiners reports and just practise, practise, practise. For creative writing, our teacher got us to write out own pieces of writing, then she marked them to ensure that they included everything, and got us to memorise them for the exam, so we just adapted to the prompt. Would recommend. Also think about the order in which you do the questions on the paper, I found it easier not to just go 1,2,3... Non fiction writing is hard to revise for except for reading newspapers and practising.
But... I loveee Lit. The general essay structure I aimed for was three key points about a character or theme per essay, two quotes per point, three analysis bits per quote, and don't forget context/symbolism. Use Stacey Reay on YouTube, she was incredible during my exams, and I will never stop recommending her 😂. I would write essay plans then memorise them and adapt to the question (you could tell I'm awful at thinking on my feet haha). Not self advertising or anything, but I have a thread with more revision questions on it, which could help? But we're all here for you, let us know if you have any more questions xx