Peter, just took a brief tour through your portfolio.
Lots of very nice shots in there. To me they look "random by subject".
Some are really, really good (to my taste) others a little more average.
You have good intuition on framing (unsure if while shooting or later at the computer)
For the next 4 weeks, choose a subject. Portraits could work, landscape could work, animals could...
Try to shoot no more than 12 shots a day (the equivalent of one roll of medium format film, but you could alow yourself 36 shots).
Try not to review while shooting. No changes in post (at least for the frame).
Go through "your day" in the evening.
Identify those shots you really like.
Find out, what sets them apart from the others.
Concentrate of improving the difference.
Plan your next day to change not more than one or two things (Try to "see differently" - I am not shure to what degree your mobility is limited, but maybe you can e.g. change the hight of your view point).
Review your progress after a week. If you are satisfied with yourself, go for the next subject.
The technical stuff is also important, but I personally learnt most when moving to medium format and needed to carefully watch my budget. On a 5D3 currently I swamp myself in pictures, which does not make for a steep learning curve as you spend a lot of time with reviewing.
I am curious to follow you development.
All the best