Welcome to the forum.
Since you have asked where to start ..... Have you got your fishing gear yet??
If not, go through the posts on Rods, Reels, Line and Tackle and read all you can about the sport.
Learn from what other members share on the forums about their own experiences.
As you're from Chennai, I assume you will be more interested in Fishing from the Sea or from the Beach.
Both, are different and will require different rods and reels. So you will have to decide.
Also, please fix your budgets. There is a lot of variety available at each price range.
Gear and tackle is usually shipped in from abroad for most of us.
However, there is a nice Online Gear Shop on IA to start with ..... visit it and PM the site owner Bopanna for your needs.
Also, start reading on the difference between "Spinning Reels" & "Casting Reels" and decide which one is
better for you. A good palce to start that is:
Most sports fisherman are usually self taught.
So read, listen, learn, practice and anyone here will be most happy to assist you with your queries.