Hello. So, the first thing you have cleared is your subject criteria. You need Physics and Mathematics, and you have that.
Now, let's get to the process.

The first step is to get an aggregate of 50 percent in Maths and Physics each. I hope you have that.

Then you get a medical examination done. Just visit Directorate General of Civil Aviation, and they have a list of doctors who are eligible to issue a fit medical certificate after scanning.

Next step is to apply to a flying school and clear their entrance test.
APFT, Hyderabad.
Academy of Career Aviation, Baramati.
Ahmedabad Aviation and Aeronautics LTD.
Indira Gandhi Rashtriya Udaan Academy, RaeBareilly.
National Flying Training Institute, Gondia.

These are a few of the ones.

Then you need to get your training and subsequent license. The first one is the student pilot license, and after 250 hours of training, you are eligible for a commerical rating.

That's it. Good luck.

Hi,
If you decide to become a commercial pilot, then you need to attend a flying school to earn your Commercial Pilot License(CPL). Some of the certified and reputed flying schools in India are:
GRUA (Indira Gandhi Rashtriya Uran Akademi), Fursatganj
Gujarat Flying Club, Vadodara
Delhi Flying Club, Delhi
Madras Flying Club (Chennai)
Patiala Aviation Club, Patiala
Haryana Institute of Civil Aviation, Karnal
Aspirants who clear this entrance exam are then scrutinized through a physical and medical exam. After which the final candidates are hand-picked.
At the training school, students get in flight training as well as theoretical lectures.

Or else,  you can complete graduation in aerospace or aeronautical engineering then you can give afcat exam, through which you can become pilot in airforce