Hello Ashutosh Pandey,

Firstly complete all the basic concepts in the books like NCERT . After that, solve  RD SHARMA for Mathematics, HC VERMA for Physics, OPTONDON for Chemistry. And also practice previous years questions and solve mock tests as much as you can.By doing this you can know how the questions are coming and also you can know how the question are being asked in the exam. Be motivated and do meditation daily to keep yourself calm during the preparation time.

Hope this helps you..

Hello Ashutosh

It's so good you are thinking high.

• To crack JEE mains perfectly you need to clear all your concepts of 11th and 12th
• Try reading Ncert books thoroughly.
• Join a crash course or you can join an institute.
• If you don't have that much money don't worry.
• Go get a JEE mains questions book
• Try to understand nature of that questions, find out topics and then understand them
• Try to solve the JEE mains questions papers before time limit
• It will be hard so don't lose hope, and grind as hard as you can.
• Just study as much as you can.
• Eat healthy, sleep, plan your day and sacrifice some pleasure time.

And you will be in NIT with CS.

Best of luck