What it means is the CG is whatever distance it states from the front of the main wings back. It helps if you're closer to the fuse. For instance, if it's 4 inches from the leading edge, just measure 4 inches from the front of the main wings back, and put your fingers there on both sides and see if it balances. If not, move the battery in the nose until it's balanced. Velcro strips will help you move the battery where you want it.

Good luck. I started on an Easystar and it's a very forgiving plane. I love mine and still fly it on occasion.

As for getting it in the air, go to full throttle, point it into the wind and give it a good strong throw, slightly up. It helps to have someone throw it for you the first few times until you get a feel for how it flies.