handspring, where you jump onto your hands and then back onton your feet, flipping forward, aren't easy. You need to train to be able to do them (not that I can or am speaking from experience).
But, trying them out, you're immediately presented by the full monty of all your weight and doing the complete
move. There's no way to parse the movement or make it easier... until now.
It'd be a lot easier to do a handspring down an incline. There'd be less "weight" in a way, and you don't have to jump as high, since the ground is going lower as you go forward (relatuve to you). So you could start at a steep incline for training, and lower the incline gradually over time until you can do it on level surface.
Basically, it'd be like a 50 foot board, with suitable gymnastics padding, and springiness in construction, but mounted onto hydraulic rams at both ends. The board can be set on an incline, or not, with the rams.