Good Choice!
Your proposed conversion wouldn't have worked, then, because the front and rear hubs have different widths, and it probably would have been difficult to adapt a 100 mm wide front hub to the 135 mm rear space. (The conversion kit has a long axle for a regular front hub, and brackets to fit the wider rear onto the front of the bike.)
However, your electric front hub should fit just fine at the back of a current-version Sofrider. The Townie uses 26 x 2" tires, which are probably too large for the Sofrider (I couldn't get mine to fit) so you'll need to switch to something closer to 26 x 1.5". If you're unsure, hopefully your local bike shop will be helpful.
There is a lot of advice here on how to learn to ride. I recommend several short practice sessions in a parking lot or on a street that has no traffic. I then started commuting to work on mine, all on quiet streets and city trails, and at the 50 mile point I was reasonably secure.
Hope you enjoy the bike.