This is a trainer that's made of foam
http://www.horizonhobby.com/Products...ProdID=EFL2725

OR, type your zip code in the search box at http://www.modelaircraft.org/clubsearch.aspx to find a local club with instructors who can teach you using the Nexstar you already bought. using 07006 it found 33 flying clubs within 25 miles.

Loops and rolls are basic aerobatics that most models can do. Your Nexstar should be able to loop and roll.

3D refers to a lot of different things. Hovering is one. Most of the maneuvers seem to be flying with the wings stalled and only the prop thrust keeping the plan in the air.