I'll second the instructor idea. It can get expensive trying to learn to fly on your own, and it could get dangerous with a glow powered plane.

Find a local club. Join it and the AMA (most clkubs require it). The club will have instructors who will teach you for free.

(The AMA provides insurance, and they have a page that will help you find a club. Just enter your Zip Code! http://www.modelaircraft.org

You've made a great choice with the Nexstar though. Read beginner's posts here, in fact, read as much as you can. There's so much great info on RCU, you won't believe it.

Oh! And welcome! It's a great hobby and it's filled with terrific people.
Dennis-