Reddit reviews Stamina InMotion Rower

No, not really portable; it's very basic. I am using this one.

If you are interested in yoga, maybe look up hot yoga. I use a couple of youtube videos for warmup and cool down, but they're basically stretching. The hot yoga exercises might be more calorie-burning.

The thing is, you want to build muscle.

I watch a lot of stuff while I exercise. Documentaries, Netflix, and even cooking shows. I feel like this has actually enriched my life over the last year.