You should score more then 220 marks in JEE Main to get a rank under 5000.

To score good marks in your exam make sure your concepts are clear. You can take help of NCERT books for your preparation.

Reffering previous year papers are very important to understand the exam pattern and level of questions.

You should also solve as many as mock test series for your practice and to know your strength and weakness. So, you can work upon them.

Good Luck!!