Hello kandacharam,

National eligibility entrance test NEET is an national level entrance exams conducted for medical stream aspirants it is  based on NCERT syllabus of class 11 and 12so your son first needs to learn the basic convepts of NCERT and can simaltaniously prepare for NEET. if he directly goes to high level concepts he will not understand anything so you can make him join class 11 crash course along with NEET training.

hope this helps 

thankyou.