You might want to try an ARF first. I am just now getting used to my H9 150 size P-51. I've been flying for two years now, and can fly the wings off my Extra 300, Pizazz and Nobler- but the warbird is a different animal entirely. By the way the P-51 is my first ARF- someone gave me the Pizazz after crashing it.
The H9 P-51 is supposed to be very forgiving- and it does fly well. But it wants a long rollout on takeoff. And landings are much hotter than I am used to. And yes it will tip-stall if you let it balloon too much on landing. And while you can get away with "banking and yanking" it actually needs a little rudder to turn nicely. And I am still getting used to working the retract and flap controls...
So far my Mustang has survived my "learning curve" without a major mishap and I am starting to get comfortable with it. I know I would have been a nervous wreck learning to fly it after spending 3-6 months building it!
But... my next warbird will be a kit