The CX3 flies similar to the CX2. I have a CX2. Since they are coaxials, they fly very stable, but also are quite restricted in what they can do. You will find that most of your turns will be done with rudder rather than aileron. Yes "leaning" into the turns helps, but at the speeds you're travelling, it won't be very apparent.
Best thing to do is hover forward and turn by using the rudder. Try landing and taking off. Try flying in different orientations. You will learn most from hovering in different orientations. Watch out for significant turbulence generated by your heli. For instance if you fly near the back of a couch or chair you will generate an eddy current sufficient in strength to "suck" your heli into the furniture!
There are lots of things to read on how to learn to fly these things. I especially like Mikey's videos, as they give you a good starting point.
Go to
http://www.youtube.com/view_play_lis...7A4FEADE61ABE5
There's plenty more out there, but try this first. And have fun. That
is why you bought this thing right?
Mack