First thing, The flight simulator on your computer really does not do warbirds justice in thier ground handling or stall charateristics. so don't use that as an indication of your abilities. An easy flying tailwheel plane such as a Sig 4-60 would be your next step followed by a high performance sport plane such as an extra 300, then onto a sport warbird such as a Hanger Nine P-47, Then maybe a Top Flite etc.