Hello there!
I did an Inspector Calls and Macbeth as part of my WJEC GCSE exam a couple of years ago.
For an inspector calls, I found that making a spider diagram of main themes and quotes quite helpful and organised my revision which made it easier to memorise. I also acted out some scenes with my friends which helped us understand the text a bit better, while saying the words aloud enabled us to ingrain the quotes into our brains.
For Macbeth, I did something similar, but instead of themes, I organised my quotes based on important scenes throughout the book, like the witches' prophecy, Lady Macbeth persuading Macbeth to kill Duncan, the murders, the descent into insanity, and finally the defeat. All the while, I thought of around three reasons why I chose a particular quote to memorise, linking it in with other themes or explanations.
I was lucky enough to escape learning the 15 pieces of prose, but if I were in your position, I'd probably make sticky notes of key quotes and points from each poem and place them in random parts of the house, saying them out loud while I pass by each one. I know it sounds stupid but it genuinely helps.
Good luck for your exams!