I am lucky to live in a house with a yard (where I’ve had to water garden plants daily) and near a trail (I’ve ridden 130+ miles on my weak-but-geared ebike, mostly shorter trips though) but there isn’t much for me to do around that I’m aware of, especially viable without a car and without spending money.
So that’s why I think external factors are a bigger part. I even did go on a more-than-an-hour trip and it didn’t magically ‘click’. Though I had to recover for a few days afterwards (and weather, including heat/sun is a common thing stopping me, also places that aren’t open in the afternoon). Also that and even shorter grocery trips I feel shorted (both for what I did and did not buy) due to high prices.
Though it’s hard measuring status especially longer-term with added complexity. It’s entirely possible not doing the things would make things feel even worse, but there’s no reliable way to actually tell.
It sounds like you’re doing a lot to help yourself and your body get what you need. It’s definitely not going to ‘click’ for everyone after one trip, but I’ve found it nice to set some goal or project around the trips. One year I walked to a viewpoint on a trail thats maybe half an hour there-and-back, and took a picture (almost) every day. I had a plan of putting the pictures together to make a kind of “gliding” transition of the view throughout the year (one thin strip for each day) but never got to the photoshopping part. That helped me get out the days I was tired or the weather was bad, because I wanted to get all the pictures for my project.
I think what you’re doing is good for you, hope you keep it up, and wish you all the best :)