Hello Ditin Bagri. Thanks for contacting Careers360 and we hope we will be able to answer your query. 

Note that the JEE Mains syllabus is based purely on the NCERT / CBSE topics of class 11 and 12.

I would first advice you to study the books thoroughly before carrying out further preparation. Right now, you should be in a state where you have done at least one revision of all topics in all subjects and should have done at least 2 or 3 mock test papers. 

But, there is no need to worry of you haven't come uptil this stage. Please start preparing seriously and switch off all your phones and TV for at least a week or so.

I would also advice you to look at the past year question papers of JEE Mains by Arihant. The tips given in the book will be very useful during the actual exam paper. 

Even, looking at the past sets or mock tests of JEE Mains will help you a lot. I would not prefer anything. But, just practice wholeheartedly with dedication. That's all. 

Hope this helps you and all the best!