Hello,

JEE MAINS exam needs practice and perseverance to crack it. through ncert you get the basic knowledge but to check your preparation you need to solve previous year questions to analyse your performance.you get to know which topics are asked frequently.almost 30-40 percent questions repeated from last years papers.by solving papers you build confidence.

Get here the best study material

https://engineering.careers360.com/articles/best-study-material-for-jee-main