Hi Shreya,
Before you decide to make money online, it would be wise to choose a product or topic that you like and are familiar with. Then, in my opinion, affiliate marketing is the easiest place to start until you know more about internet marketing.
Study internet marketing sites, forums, read articles - anything you can do to learn. There are several good books around on the subject as well!
Good luck, I wish you the best
Tess
Internet Marketing Strategies & Resources