How would I go about making a mech/power armor system

So, I really want to make this power armor or mech system where the player simply holds a proximity prompt, their character is switched to the power armor/mech, and upon a keypress they exit out and back into their regular character.

But how would you go about this? I tried a few methods as of late but I keep running into technical errors with morphing and etc etc.

Oh, and I am trying to host all the scripts inside the powerarmor/mech.

Appreciate it!