Hello Harshul Aggarwal

If you want crack the JEE Mains it's good thing. Firstly you should have strong foundation in class 11 & 12 syllabus. If you have good foundation & knowledge then you easy crack the JEE Mains with good percentile. If you do regular practise 2 - 3 hrs practise the bits as many bits & doing mock tests you can easy achieve it. But you have to practise practise & practise. Practise makes man perfect. That is secret of the success.

Hope this will helpful

Good Luck.