Yes. I didn't realise you were so young

What adam says is true. Your body still has a long way to go. Start lifting in the gym but you can wait on the protien and creatine for a couple of years. Eat the proper foods and lift the weights. Your metabolism will slow down soon and then you can settle in to things.

EDIT: Get your parents to invest in a good multivitamin for you. While your body is growing it will really be able to use the extra vitamins. Even flinstone chews are better than nothing.