Re: suggestions for little person- bikes to motorize
You say the fit from seat to handlebars can be a bit much? The older green Moon Dog (mens cruiser) bikes are a shorter frame and have looong pullback bars.
Also, I have seen beach cruiser 20 and 24" bike with an engine kit mounted up, no problem, and easier than the Stingray type chopper bikes fo'sho'!
If you have the desire to overcome your lack of mechanical prowess, you have the battle half won.