Another good one to introduce you to warbirds would be the Top Flight T-34. This is what the military used for training of their pilots and would be a good step for you to learn about the way a warbird handles. It definitely will introduce you to rudder and has many of the flight characteristics of warbirds, but it is also very forgiving and will let you learn to fly warbirds without the hassels of flying a warbird right off the bat.
This one is also on of my favorites and is on my "to build" list. Not sure why, but I have always loved the lines of this plane
Top Flite T-34 Mentor
Ken