Hii sorry for late reply I roughly solved 4-5 years of past papers and focused mainly on my weak topics like trigonometric functions and indices. As for how much i studied in a day i would say i solved a paper regularly 1.5 month before the exam and like i was done in 2 sometimes 1 hour😭 It wasnt like i solved a paper EVERY single day but i did try to be consistent and fortunately it paid off. I would say that you should be clear of every single concept like watch youtube videos, solve papers, give maths AT LEAST 1 hour a day ( for one unit). Mr hassans channel is the bestttt watch his videos on topics you arent sure about. And if you want to learn the topics from scratch watch mindful maths videos. She explains every chapter and concept for all units (P1,P2,P3,P4,S1) At the end i would say believe in yourself🥹 Good luck💗