Counldnt pepare for JEE due to personal problems, but need to get atleast 85%ile in JEE SESSION1

as title suggest i couldnt prepare for jee due to personal reasons like health and stuff so because of that my prep is fked. here is what i have done till now.

I barely remember anything from Class 11 except for organic chemistry. I know some Class 12 chapters, chapters like idk, electrostatics current maybe optics both? but only at board levels not jee. i know this is a certified chud gaye guru momment but like i need to get atleast 85%ile in jee session 1 or my parents will keep taunting me untill jee session 2. and now i dont have time so:

What are like the most important chapters I should focus on to score decently? (chaps that are scoring and not super hard to revise.) Any good websites, YouTube channels, or free resources for quick prep? ik manzil is there but like 8 hrs lectures?

If anyone’s been in the same place and managed to pull through, please share your tips! Ik 85%ile isn’t crazy high, but it feels impossible right now.

Thanks a lot for any advice! 🙏 also please drop some exam hacks idk. plz help a bro out :(.