Thats a very good idea to prepare for it. You have approx 2 months of time to prepare so utilise this time as much as you can.

because there are a lot of college give admission on basis of JEE mains only just like all NITs , DTU , NSIT , IIIT and many regional college, so start preparing .

ALL THE BEST!!

You have around 2 months to prepare for JEE main April session so you can plan your time table in 2 month so that you can cover all your way topics is you have done study throughout the year now it's time to revise all the stuff and Excel in the exam please consider the following important points before planning your strategy.

Solve some mock test in figure out the week topics for which you need to give hi focus

if you have not solved all the previous years question then do it first at highest priority

For JEEmain NCERT is a must so first of all you should cover all the NCERT books especially chemistry.

Practice is necessary so while attempting any test series give it with full seriousness so that you can analyse your performance.