Hello Aspirant,
It depends upon your target year, see if your target year is 2022 then honestly speakin it is not even possible because only a month is left for JEE-Main 2022 to be commenced and if it is 2023 then you can crack but your syllabus might not get completed by the time of JEE-Main 2023 because it is having less than a year and JEE-Main comprises of syllabus of class 11th and 12th both but still you can crack, most probably with average marks but if your target year is 2024 then definitely you can crack it with very decent marks because still around 2 years are left for JEE-Main 2024.

So I am enlisting down some tips which would help you in starting your preparation for JEE-Main :-
>>>>>>>> Very first thing is go through the syllabus of JEE-Main and categorize it as easy, average and difficult.   https://engineering.careers360.com/articles/jee-main-syllabus

>>>>>>>> Make a proper time-table to balance your studies and daily routine work and give more time to studies.
>>>>>>>> Go for the best study material which can make you more confident while solving the question of JEE-Main because it will boost your moral   https://engineering.careers360.com/articles/best-study-material-for-jee-main

>>>>>>>> Don't forget to make notes while studying because it will help you in memorizing the important things in the last time prior to exam.
>>>>>>>> Practice previous year's question papers and sample papers as many as you can because it will enhance your self-confidence and time management skill   https://engineering.careers360.com/articles/jee-main-sample-papers
https://engineering.careers360.com/articles/jee-main-question-paper

>>>>>>>> Don't forget to do exercise and yoga regularly to keep your body mentally and physically fit.

You can also take JEE-Main Learning package for your preparation   https://learn.careers360.com/jee-main-coaching/?icn=JEE_Main_knockout&ici=JEE_Main_article_view_sticky

For more detailed preparation tips for JEE-Main kindly check out the link given below :-
https://engineering.careers360.com/articles/jee-main-preparation-tips

I hope this information helps you.
Good Luck!!