My husband rigged up a motor assist for my old mountain bike that got me started. I progressed to not needing the motor, to using a trainer with my regular bike, and now finally I'm strong enough to use a regular stationary bike at its lowest resistance

I have a handout that my husband put together with pictures and descriptions of the motor assist set-up. If anyone is interested, send me your email address and I'll send it to you. It's a bit long to go on here.