Shooting has how many catogaries like pistol shooting rifle shooting?how to get licences in india?where can I approach for practice?is there any age limit?

There are so many sports and so many variations of sports with firearms that I am not going to list them. I just did a quick Google search for gun laws in India...you are fighting an uphill battle to get a firearm there. They regulate action (appears you can't own a semi-auto), caliber (certain calibers are regulated), and even the need for one (you have to have a reason). Minimum age is 21.

Coiontact a local gun range or shooting organization rules are different in every country