Re: New to all of this
I think if you think about it a minute you can draw the right conclusion about even trying to mount a powerful gas motor drive sprocket to a toy plastic rim.
There are both gas and electric 'friction drive' motors that turn the tire itself that would work, but again I ask, what is your budget and use/need, meaning is will it be your sole transport?
Plan to use it awhile?
It is hard to help steer you in the right direction until you know where where you are going, the conditions you will be riding in, and your wallet.
Just a note...
Other than my Keylock Wiring Upgrade I only sell completed bikes to local Phoenix, AZ people so my help has nothing to do with your wallet.