I also live in a very rural area. My township, large as some counties in some places, has no traffic signals, retail establishments or a police force for that matter. Lots of dirt roads, farm tracks and trails too.
I think the reason people are telling you that your bike is not an ebike is because you can get the health benefits you seek from an ebike, but you probably can't from a moped.
I want the assistance and I need to keep fit, I'm in a race with the grim reaper who will eventually win, but right now I'm in the lead
The topic is way more complicated than a larger chain ring. To get the most benefit from your effort you won't get there with that style of bike. I'm also a motorcycle guy so I do think your bike is cool!
Issues :
- Q factor
- Seat height for proper leg extension
- Width of seat for best cadence
- Body core position over the cranks
- Shoulder and arm extension to the bars
- Width of bars
- Gearing
Some of these issues are about efficiency, some are about joint health and safety. I'd like to see you get the health benefits you seek. I believe you'd be wasting your time and money trying to do it with that bike. That doesn't mean I think its trash or that you should get rid or it. Maybe adding another bike to the stable is the answer.