For EU citizens to envisage a career in space, as an astronaut, the following ESA handbook gives details about the selection process.
Similar information for US citizens can be found at this NASA site
What would be the selection process for India?
For EU citizens to envisage a career in space, as an astronaut, the following ESA handbook gives details about the selection process.
Similar information for US citizens can be found at this NASA site
What would be the selection process for India?
At least in the near future, they will mostly be recruiting from the Indian Air Force. So prepare for AFCAT.
There is another way - earn lot of money.
It is speculated that a single seat in a free-flyer SpaceX Dragon costs over $25M
https://twitter.com/DJSnM/status/1439470685064073219 With Starship, that figure could drastically come down (an order of magnitude lower than Dragon).