Becoming a freemason.?

I am thinking about trying to become a freemason because I love history and the idea of incredible secrets. I am fifteen and I do not know if I can become one yet but how does it work? Do you get to know the secrets that not everyone knows of history? And how long does it take to move up through the ranks? What happens when you get past the 33rd degree? And it's nothing satanic is it? I don't follow that kind of stuff. Please just give me details on what it is, how you join, and what you do throughout your masonry. Thanks.