JEE Main

Hello Fathima from your question its realise that you are asking from starting phase like fresher how to prepare for mains and Advance so , From starting Firstly devote to 10-12 hours daily to yours Study.
start from Basic Mathematics like Differentiation , Integration , Logarithm Function, Modulus Function, Greatest Integer Function .
After the Completion of Basic Mathematics then Start Physics , Mathematics, Chemistry.
One of the most important things that is required in this examination is that patience so keep patience and study with consistency Like in Mathematics:
After Basic Mathematics start from
Sets
Trignometry
Permutation and combination
Sequence and Series
Quardic Equation
Complex number
Binomial Theorem
similarly in this way gradually your maths syllabus will complete .
and at the same time similarly complete physics and Chemistry syllabus in this way at last you feel that your preparation will be complete.
in the last i want to conclude my answer
Firstly Start any topic from Basic and focus on concept By Using This Steps you can prepare for JEE Mains and Advance.
1. Attain All lecture.
2. Make proper Notes.
3. Proper Revise of Notes.
4. Solve Topic wise question
5. Do maximum question as much as you can.
6. And in last Attempt Mock Test
These all steps that you have to follow