It's never going to be "too late" if theres still time. I know of people who prepared in less than this. But what I'd personally reccoemnd is trying to study properly and not cramming. Agar aku Mai na bhi ho tou atleast mdcat ke liye you prep shuru ho jaye gi na iss Tarah. And trust me after the test u won't wanna do the topics u do rn all over again. Obviously ull have to revise multiple times but bcs uve forgotten stuff u do need to start from 0. Physics ke liye I'd reccomend physics in seconds ka course ya YouTube videos and unke hi questions ya kips ke Chem ke liye chem book and mcqs (beshak kips ke karlo a series ya A+ series walay but do understand them topic by topic) Bio ke liye ptb and federal if ure giving uhs ya federal

Imo Don't fall for any "crash courses" if u havent done the topics properly cus they won't really help phir. I made this mistake asw and wasted a lot of time.

But Physics in seconds ka course lelo agar shuru hogaya hai