You did not mention the brand of P-51 or the size and brand of engine you are using. This information might make it easier for someone to help you. Larger scale planes are a lot easier to make look "as real as possible." Just use the little ones to learn how to fly on and the bigger ones will be easier when you get to them. Like everyone else here I am assuming you have a 40 size P-51 probably a Chinese ARF from Nitro Planes. However If this is not what you have, chime in and let us know.