Welcome to the best hobby ever! I started at about your age, and the PT40 was the 1st kit I built. I do not remember which engine I used, think it might have been a K&B .40. It is an easy kit to build and you should enjoy it. Take your time and you will be fine. We are here to help. Its good to see another modeler interested in building kits. That is my favorite part of the hobby.