ORIGINAL: NorfolkSouthern
You should do well with the Sig. That's a first kit for many folks. After you've learned on it, you could go to a 3D plane to practice tight and quick maneuvers, like a Hangar-9 Twist. My experience indicates that the Twist would be more forgiving because of the thick airfoil, yet more agile because of the larger control surfaces. When you feel you're up to it, you can put the old engine on the Cap 232 and give it a whirl. On RealFlight G4, the Cap was trickier for me than a lot of other planes, including the Ultimate bipe. It would snap to no end and I had to watch my airspeed when landing.
NorfolkSouthern
Yeah, there are a couple guys with Twist's at my flying field, and they seem to like them a lot. They are not great 3D pilots, but I think they got them recently so they are still learning how to do stuff with them.