Hello Aspirant,

See as we know that syllabus of JEE-Main 2021 and that of class 11th and 12th is quite similar so if you complete your syllabus of class 11th and 12th and that too from NCERT books then it is plus point for your JEE-Main preparation. Because now you must be clear with the concepts of NCERT so now you should proceed for numerical practice and start solving previous year question papers and sample papers as well. You can download the papers from the link given below :-

https://engineering.careers360.com/articles/jee-main-sample-papers

https://engineering.careers360.com/articles/jee-main-question-paper

NTA has also given the facility for mock test which you can give from the link given below :-

https://nta.ac.in/Quiz

For Physics and Mathematics practice of numerical is must to do so just start with it and two months are enough to get well with Physics and Mathematics.

I hope this information helps you.

Good Luck!!