If you want a warbird get a warbird don't waste your time on something you are going to be board with in a short time. If you can fly your trainer well then don't worry about changing to a low wing plane they are not that much different. Just realize it will go where you point it, and will land faster. Keep the throw rates conservative and you won't have a problem. If you want a warbird two guys at our field have the Modeltech P-47 (60 size) and one guy flew it as his second plane. The retracts are kind of a pain on the grass field but they are both getting along.

I have been flying for 9 months now. I started with a trainer, soloed after three weekends, one month later I was flying a Sig Somethin Extra, two months later I added a GSP Katana to the fleet, followed by a Phoenix models Sukhoi and am currently flying a Dave Patrick Edge 540 as well.