Hello Aspirant

If you are interested in cosmic matter you have the option of becoming an Astronaut,Vyomnaut or a scientist.

The basic need is to get a bachelor's degree in a science stream

Keep updating yourself with various things that happen around you

to become an Astronaut or Vyomnaut you should have

1.Valid degree

2.Good sense of mathematical knowledge

3.If want to become an pilot minimum 1000 years logged as a former pilot

4.Physical and medical fitness matters a lot[height,weight]

5.Keep upgrading yourself in various stream that will help you to increase your exposure!

AS till now no manned mission have taken place in India,there is no formal regulations that has to be followed

But the above mentioned point are basics and will be always helpful

Regards!