First of all, you have a nice name- very simple but sweet.
I would like to know you age and qualification. Because whatever you have mentioned in your query, I got an hint that your have done with your college education also.
At this point of time, what is the need of name change? I mean, It can be problematic for you for whole life bearing two different names as it will be difficult to change you name in will your academic as well as legal documents.
The procedure to change name is, you have to put and application for name change and mentioned you current name and the name you want to have.
Get it signed by gazetted officer and submit it at your local government office.
You also need to publish a column of name change in your state news paper and keep its cutting for your future reference.