Cella, i am not sure what will work for you; but mortality is what did it for me.
When my mother fell 2x last year and broke bones both times, I had my wakeup call. Osteoporosis and being out of shape are a bad combo. You need to be in shape to keep from stumbling. You need to be in shape to be able to open jar lids and climb stairs. Bicycling has been a great gateway drug for me. From there i have progressed to walking, stairclimbing, weighlifting and pushups.
I am not someone who exercises 3 hours a day; but for sure, I am trying to do SOMETHING 6 days a week.
I hope you get off your azz soon