Welcome to the world of Giants. 14 isn't a bad age to get into Giants if your dedicatedI got my first African Rock at 13-14 years old.
Burms are wicked cool snakes, but very powerful, so keep on your toes! Never let their modest temper lull you into a false sense of security, and be prepared. At your age, it does take some determination to keep at it with giants. They really get to be a handful. Cleaning their cage, getting bit, their sometimes unwanted temper, and a myriad of other things can happy that could either make you, or break you as a giant keeperJust keep at it, and don't give up! Good luck with your new pet!