I honestly don't care about your age. I know a boy who started programming in a very young age and became a web master in his 17, but David is right. Making game is a lot of work, and this 'lot' is really lot of things.
If you want to start making games as soon as possible, I will suggest you to follow Steve's link and get started, or simply download some game makers. I don't recommend that though. It's always a good idea to learn the very basic things first.
If you're not in hurry, go learn programming. Some people say Python is a great language to start with, so I suggest you to go with it. I found that Python is pretty easy myself. Go here for some tutorial.
Learning programming is very useful. It makes you a better analyzer (I don't know why, but this word really tickles me), thinker, and gives you better logic which will help you to make games.
After you learn basic programming, go for some library to make games. PyGame is good.