Hi Swapnil! Since you are still studying we suggest you do theater in your college or join a local theater group, this will give you a lot of exposure. You can then Join a good Acting Academy to receive formal training, by then you will also realize how serious you are about this as a career. If you join a good institute you will be guided ably. You will need to have a good portfolio to approach casting directors and a show reel would help even more.