Hello student yes you can start preparing for Neet entrance examination, Prefer NCERT to build your basic concept and make sure you do each and every example and exercise questions of Ncert before jumping to a reference book.

You can also subscribe to careers360 knockout package for preparing and qualifying the entrance examination.

Eligibility NEET - candidates must passed or appearing class 12 with physics chemistry and biology with minimum 50 percent marks from a recognized board.

Refer to the link mentioned below for more information - https://learn.careers360.com/knockout-neet-may/

Feel free to comment if you have any doubt

Good luck