Hi,

It is more than enough unless you revise it. I would suggest rather read the ncert thoroughly and solve all it's problems. A good coaching institute’s material would be enough afterwards. If you keep doing new things till the end and go to the exam you will perform miserably. But if you do 2–3 things (NCERT, Coaching Material, JEE questions) and revise them thrice or maybe 4 times then I can guarantee, you have a good exam.

D.C pandey is really helpful, actually it is used for the preparation for Advance but if you are MAINS focused only then skip the LEVEL 2 SUBJECTIVE. DC Pandey is good for JEE Mains. Level of questions asked in JEE Mains will not be higher than those in DC Pandey, but when you really want to achieve good marks, be on the safe side. JEE Mains can ask question from any topic in their syllabus, so it would be better if you study HC Verma as well. Theoretical questions can confuse you if concepts are not clear, so, try to give time to HCV. Solve the objective exercise there and you are good to perform better.

Hope this helps.

All the best.