I recommend picking the ship you like because you like it, not because of how it flies. Pick it because it looks good, or you just saw it at an air show, or because your grandfather flew it in the war. It's best if you fly an airplane because you love it and not because it's super in the game.
That said, if you don't really care about any of the airplanes, I recommend the F6F Hellcat as the ultimate learning fighter. It's not too hard, and not too easy.