Hello Ramkumar. You have decided to join a very unique branch of engineering and I say that because it has an intense study program that not many can cope with. It isn't as hard as it sounds and you can definitely pursue it if you have grit and determination. You should start your preparations for JEE exam, which the biggest exam inthe nation for engineering aspirants. You could then pursue aeronautical engineering at the prestigious IITs. Best of luck for your future.