You should join mock test series for JEE Main exam. It is very important to solve as many as test series for your practice and to know your strength and weakness. So, you can prepare accordingly.

After giving each test it is very important that you analyse your preparation level. Learn from your mistakes and try to repeat them.

It is recommended that you solve two or three mock test series daily.

It is also advisable to solve previous year papers to understand the exam pattern and level of the questions.

Sometimes, you can get direct question from previous year papers.

All the Best!!