Hello Aspirant,

Preparing for JEE Mains in 4 months would be a little challangeing but yeah it is not impossible.Here is a plan you would need to preferably follow so as to excel in your preperation.

1st Month of preperation-Physics-Do thorough revision of Physics by alloting 1 day to Easy and Two Days to prepare tough topics.Rather than cramming up the theory you must focus on reading the concepts(By refering a formula book-allen,resonance,etc.) and solve more and more questions(preferablly past years).I assure you this strategy will boost up your confidence and also your Physics score.

2nd Month of preperation-Chemistry-Do a thorough study of the NCERT book with a line by line reading approach and definately you will score good marks in chemistry.Focus on  building your chemistry as strong as possible as the questions would be knowledge based and would be answerable in lesser time.

3rd Month of preperation-Math-For math first of all revise all the formulas and just formulas.Do not focus on reading proofs and theory.Solve more and more variety of questions including past year problems.In math the more you would practice the better you would become.

4th Month of Preperation-Past year papers-Solving past year papers in a time bound manner will make you exam ready.You should not worry if you get low grades but practice more and more questions and properly analyse the whole paper once finished.

This is my 4 month plan for you.Hope you like it and follow it and I ensure you you would do wonders in your exam.All the Very best.

You can also use the college predictor as follows-

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer