Hello student Jee main March paper is similar important as Jee main other attempts. Prefer NCERT to build your basic Concepts and make sure you solve each and every question and example of NCERT before jumping to any reference book.

After thoroughly completing NCERT you Can solve some reference books as mentioned below -

Rd Sharma Mathematics

Op Tondon Chemistry

Concept of Physics By HC Verma

Arihant practice Book for Jee main

You should also solve previous year question paper and mock test paper for practice.

You can increase your marks in Jee main by practicing only so practice as much as you can if you're scoring 180+marks now it's  very good all you need to practice a little more.

Refer to careers360 knockout package for preparing and qualifying Jee main entrance examination in one attempt - https://learn.careers360.com/knockout-jee-main-april/

Feel free to comment if you've any doubt

Good luck