Getting started means alot of things. I recommend ground school...with an instructor or a good book. Learn the importance of the center of gravity on a model. Why does the plane balance here? Where is the center of gravity on my model? Well, look at the plans or instructions. Or you can find the thickest point on the airfoil of the wing...generally the center of lift...except for underchambered wings, and this is mostly on the main spar. If the chord is constant that's the CG, if it's a tapered wing, you have to find an average like half span out from the fuse, at the main spar. Hold the aircraft suspended on this point. Is it level, nose high or tail high? Add weights or lighten the aircraft to adjust. Once balanced you can fly. A poorly balanced model is hard to fly, and if it's way off...well you may not be able to control the plane.

How do the control surfaces effect the plane? Pitch, roll, and yaw axis? Know what that is and how the ailerons, elevator, and rudder effect them. What to expect from an aircraft in motion, when a control surface is deflected?

These facts all add up to a successful flight. Things you need to know...many things add up. Field equipment is neccessary. A good instructor is a great thing.

I learned by myself, however, not good advise for the novice. I learned by tossing a glider (two-meter span) down a hill. I got basic flight from that. There's more to know, that an instructor can get across to you in a few flights, that I had to teach myself.

Good luck....keep trying!