So the initial elibility criteria for you is to get 55% and above marks in PCM in 10+2. And if you are from non Science field, then you can enroll in a course called NATIONAL INSTITUTE OF OPEN SCIENCES. To get the Commercial Pilot Licence, you need to attend some flying school. Some of the top schools are

1. Madras Flying School, Chennai
2. Gujarat Flying Club, Vadodra
3. Indira Gandhi Rashtriya Udan Academy

Candidates after this are taken for physical and mental fitness test and then the final selection takes place.

After earning the commercial pilot license, you then need to go for the Type Rating.

Type Rating is the training or mentoring you get beyond the rudimentary flying school training. This training certifies that you are eligible to fly a particular aircraft.

Thank-you.