How about setting your model up in the middle of your parent's property - maybe on a folding chair. Pace off and mark various distances. Look at your plane from the different distances and you should get a feel for how it appears at different distance from you. Set it up on its nose showing the bottom. You might be better able to estimate your flying height. Do sides, front, rear, top and bottom. Take some pics. You may find that it doesn't look the same at a couple a hundred feet than it does at arm's length.

Yea, I know, familiarity breeds contempt ... Who knows, this just might help you better "see" the plane.