Creatine is a natural amino acid, and you take it everytime you eat steak. So it's nothing to feel apprehensive about. Just like taking any other supplement. All creatine does is provide more "P" to join with an "ADP" to make "ATP" which is what your body uses for fuel. It's not an anabolic...it won't make you grow, directly. It WILL allow you to train a lil harder and a lil longer, and THAT may make you grow more efficiently.
I agree on the protein. Get lots of good clean food sources. Otherwise, as said above, use a fast absorbing protein, like whey, post workout...and some dextrose too. Like Protein Factory's Recovery Formula.