Aviation

To become a commercial pilot:
1. You need to first possess a student pilot license. You must be over 17 years of age and have completed 12th in Science (Physics and mathematics) with 50%.
2. Your vision in one eye must be perfect. In general medical terminology, it is called 6/6 eyesight. In the other eye, you could have an imperfection of 6/9, which must be correctable to 6/6.
3. General physical fitness is mandatory. You must be free of any disease that can hamper normal function.
4. You need to register at a flying club which is recognised by Directorate General of Civil Aviation (DGCA), Government of India.
5. Next is private pilot license which includes sixty hours of flying. A commercial pilot license may be obtained only after a PPL and 250 hours of flying.
Some of the institutes offering commercial pilot training are:
1. Academy of Carver Aviation Private Limited, Pune.
2. All India Institute of Aeronautics, Dehradun.
3. Center for Civil Aviation Training (CCAT), Delhi.
4. Glorietta Aviation, Ghaziabad.
5. Fly Wings Aviation Private Limited, Mumbai.
For more details, you may refer to the link mentioned below:
https://hospitality.shiksha.com/commercial-pilot-training-in-india-categorypage-6-87-301-0-0-1-1-2-0-none-1-0#page-top

They need to clear the entrance test exam of the flying schools in India, they also need to clear the physical fitness (which is tough one). Only totally fit person can get the opportunity to get admission in flying schools.
The cost of education is very high, it is around Rs 20- 25 Lacs. Many banks can give loan up to 50%.
After completion of education, they get the license of pilot. Airlines companies hire the successful candidates as a trainee.
The salary of a trainee is less. After successful completion of training periods, they are posted as a pilot.
Even after becoming a commercial pilot, they need a regular medical check up, any problem in health can cause cancellation of the license of the pilot.