Basically if you can handle a plane proficiently then you should be able to handle a warbird like a P-47. The bigger the better to a point but a Top Flite 60 size P-47 or the H9 version handle like a sporty plane.
Warbirds have retracts and flaps so the pilot workload is a little more than a 4ch sport trainer.
The hard part comes in landing the plane but these have large flaps and slow way down when you need it. That's the important part, you have to understand when to use flaps and how much power to keep on until landing.
Look into the TF P-47 I'm pretty sure you won't be disappointed.