It is very hard to find scope in india as an astronaut, but if you have well determination ,you can achieve.
1.A bachelor's degree in engineering, biological science, physical science, computer science or mathematics.
2.At least three years of related professional experience obtained after degree completion OR at least 1,000 hours pilot-in-command time on jet aircraft.
3.The ability to pass the NASA long-duration astronaut physical. Distant and near visual acuity must be correctable to 20/20 for each eye. The use of glasses is acceptable.