I know that you already have the CAP so build it & enjoy looking at it. However, since it is unlikely to survive for long as a second plane (sorry, but true), plus it's really not very warbird-like, I have another suggestion.

Do this in a couple of steps.

1) Convert you trainer to a tail-dragger, re-balance it so that it is quite nose heavy, max the control throws & re-prop it with the steepest pitch prop that the engine will comfortably pull on that airframe. Practice with that until the cows come home. This will give you a faster, touchier plane, with higher approach & landing speeds, but will not be completely beyond your skills.

2) Next, get a quick sport plane like a GP Ultra Sport+ & practice with that until you are comfortable with the speed & responsiveness. Then start loading it with ballast to increase the wing loading & keep going like that until you are really comfortable with high stall speeds, tricky power-on approach turns & hot touch-downs.

At that point you will be ready to start flying warbirds -- oh yes -- & maybe the CAP.