never worry jayan just keep few things in mind

prepare the list of the syllabus if you are from Kerela it will not be a big deal for you as the syllabus of the Kerela board and keam is very much relevant

secondly, try to evolve your problem-solving skill as much as possible as the analytical skills matter the most try to solve the previous year questions as much as possible and never waste your time

third, keep the basics of your strong point chapters intact mostly in case of physics and mathematics
stay cool and prepare the list of your strong point and weak point start practicing as much as possible.

all the best