heyy. i'm in the exact same situation as you. from what i've found, you could start past papers (maybe one or two a week) while revising the syllabus as well. just do the papers thoroughly and make sure to revise your mistakes.
then, you can slowly increase the amount of past papers you're doing, and if you're still repeatedly struggling with a single chapter, you could try topical papers for that. about a month before the exam, you could amp up the amount of past papers you're doing to get done with however many is your goal. i hope this helps!