HELLP

I(17F) got 82 percentile in jee mains attempt1
Then prepared for boards (cbse)
Now, I got back into papers and I am not able to solve much
Ho do I go about rest of my portion so as to get a good percentile in mht cet as i am only interested in circuital branches(not extc tho) for top colleges within mumbai i.e. SPIT, VJTI,DJ SANGHVI