Well, to keep interested and to get a lot more "bang" for your cardio buck, perhaps your cardio could be something like this:
3 x Weekly longer walk/rides at a cardio level (you can speak, but you shouldn't be able to read a book out loud type effort). Total time - 90 min.
This allows good base-building.
2 x Weekly a brisk walk to warm up (20 min) and then intervals on the trainer. ( 1 minute Very Hard, 2 or 3 minutes easier, repeat 10 times) 30 minutes. (If this seems too short, you're not working hard enough..too hard, back off a little and work up to the 30 minutes).
Weight-training 3 times weekly using body-weight. (i.e. push-ups, squats (one-legged), modified pull ups, planks (both regular and side planks). Start with 15 repetitions, one set each. Build up to 3 sets.
Stretch.
One day off where you take it pretty easy.
Vertically challenged, but expanding my horizons.