Yes, VMC study material is good for your preparation of JEE Main but it is recommended that you go through NCERT books first to make your concepts clear and to build your fundamentals strong. 

You should also solve previous year papers to understand the exam pattern and to know the level of the exam.

Solve mock test series for your practice and to know your strength and weakness. So, you can work upon them.

Always try to learn from your mistakes and try to increase your speed with accuracy to score good marks.

Good luck!!