I too had the dream early on of becoming a pilot. I can't tell you exactly how to go about it in India, because I am not that familiar with the EASA regulations or aviation in general, there. I grew up in Romania where the only aviation there, was military aviation. In USA, there are various type of aviation.
The path to becoming a pilot varies slightly based on the type of flying you want to do. First, you have to do some research and figure out what type of pilot you wish to become. Do you want to fly military aircraft or civilian aircraft? Do you want to fly airplanes or helicopters? Maybe, gliders or hot air balloons are your interest.
Also, please remember that being a pilot has huge responsibilities that require much dedication and focus. Make sure that you want to become a pilot for the right reasons.
For military aircraft, obviously you need to join the military first. Not sure if India has a military College or Academy, but it may be something to look into. The military will have its own rules of how they do things.
In the USA, if you just want to fly a small plane (just big enough for your friends or family), you need as little as 40 hours of flight instructions from an approved school and pass a test to get your FAA private pilot's license.
For the bigger planes, where you will be transporting people or cargo and getting paid for it, you will need to get an ATP (Airline Transport Pilot (commercial) license. I have not researched this in a while, but I believe you need about 1500 hours of flight time and various ratings for instruments, multi-engine, and turbine.
There are a lot of aviation related schools in the US that can help you achieve this dream. For an example, you can look at American Flyers or Embry Riddle as just 2 of the many schools available.
Good luck with your quest!