The differences between nose wheel and tail wheel airplanes is greatly over exaggerated.
However the difference between learning to fly a helicopter compared to an airplane is signifigant.
Two of the easiest tail wheel airplanes to fly are both 3's.....the J3 and the DC3.
Differences are irrelevant, as are helicopters. What is relevant is the need to obtain proper training in the operation of conventional gear aircraft. Even the "easy" cub will kill you just as dead.