How to start 3D???
Well said texas 3d
I couldn't have said it better and its true anywhere you go.
Just don't listen to jealous grumpy sods when they complain about your flying style .(no offence meant of course).
The first manuver i tried was a blender(search for it on rcu).Once i mastered those i moved the center of gravity back loads and then managed to do a blender , flatten the inverted spin out and then climb back up the way i had come!
The next manuvers I tried were prophanging and torque rolls. These are at first indescribably difficult but you need to practice practice and then do some more practice.After this i tried walls and parachutes and then i went back to the smooth aerobatics which I am doing at the moment(rolling figure eights and vertical eights and loops and rolling square loops and snaprolling circles)
Good luck
luke