Hey Shubham,

To become an Investment Banker in India you'll need an MBA in finance with a decent aggregate+ minimum 4years of professional work experience.

For now you can do a job of advisory in any financial company along with your studies which might help you in learning certain tactics and would certainly improve your analytical skills.

After 12th you can opt for B.Com or BBA Finance followed by MBA.

I hope this helps.

Goodluck!