Ok. You're going about this backwards. Do you already have the power system? Do you have a budget worked out for how much you can spend? You're going to need, at a minimum, a good airplane design with the right power and servo recommendations, a reliable transmitter and receiver, a set of servos, the right motor and speed controller, the right battery for your power system, and a charger for your battery. If you're good with all of that and are now ready to build your airframe, there are some plans websites we can direct you to for some reliable designs.