Aviation

You have not written about the extent and nature of disability. So it is quite difficult to tells anything about this. However, a Commercial Pilot, in all of the countries around the world needs to have a current Class 1 Medical certificate which has specific passing criteria. A person who is handicapped by the right leg might be able to clear the Class 2 Medical (Only outside India, like in Canada, USA etc.) but not the Class 1 medical. When a pilot trains for PPL and then CPL, a pilot has to use both feet for using the rudder pedals, specially in case of an engine failure or cross wind landings. Because of this the pilot needs the use of both legs.
So i would suggest the best option for you would be to consult and Aviation Medical officer of our country and he/she will be able to tell you if you can clear a Class 2 medical and get a PPL license instead of a CPL.