"if you had a month where you could dedicate hours a day to learning and becoming a better photographer, but had limited mobility and likely couldn't spend a lot of time 'behind the lens', what would you learn and how?"
Peter, speaking as an amateur myself, I'd say you've learned the most important lesson: to allow your mind the freedom to see photographs in everything. You seem capable of learning technique on your own, so I won't address that. I'd say your biggest area of focus should be composition, either before the capture or cropping after the fact. Your photos are nicely selected scenes, but many lack the framing/composition to have a strong effect. I'd make two suggestions: first, try photographing without a camera. By that I mean look at scenes you'd like to photograph and really study them with your eyes. What part is essential to the image? What can be excluded? What *must* be excluded? Ask yourself where the eye rests first on the scene, and how would the composition lead the eye through various elements of the image? Which areas of the frame are lacking content, and would be "dead" in a final image. Study a scene for several minutes before you shoot each photo. The second suggestion is related: get books of photos by successful photographers whom you admire, whether they be landscapers or PJ's. Study their compositions. Where do their photos draw your eye, and where does your eye travel from there? Study every part of the image: what does each area contribute to the image?
There are the skills I've been working on.
Best wishes for your recovery.