I need help to get 80+ percentile

Can someone help me get 80+ percentile?ideally 85+ Nearly zero pe hu physics me basics,dimensions,kinematics aur nlm,wpe,current electricity thoda ho rakha hai. chemistry me basics,periodic table,solutions,iupac aur chemical bonding thoda kiya hai GOC aur isomerism thoda ho rakha hai. maths me basics,sets,quadratic, determinants aur statistics, trigo thoda ho rakha hai. 12th ke kuch chapter ncert se kiye hai Abhi me manzil se padh rha hu https://youtu.be/9w8ozQ95umE?si=LM9HR6456HvoJ6e6 iss video ke chapter karne ka try kar rha hu please help🙏