Hello Aspirant

Becoming an astronaut is tough and requires many years of education and training.

Engineering in biological science, physical science, computer science , mathematics etc is required. then you also have to have pilot training and then physical fitness according t requirements. Then finally you have to pass the exam for astronauts.

it is a very unique field but has a lot of competition than the opportunities. I would suggest you start preparing for this field only iff you are 10, 000% sure