Anyway. One of the important steps (pun somewhat intended) of getting back in mental shape was to walk part of the way back from work. If I would have walked all the way that would probably have been something like 80 k steps and I could get off the train at several places on that way. And since I could also get on it again I could both choose the length of my walks and the vary where they took place.
My record during that period was a day where I in tota walked almost 40 k steps. There is something that happens after about 3-4 hours of walking like that. At least I can achieve something similar to a runners high. Also, I had some problems around let's say my more sensitive parts, which also got completely fixed by that treatment.
If you've just walked for 1-1.5 hours, that's still good and everything. But if you have the time and have some mental/physical problems, and like walking, try 3-4 hours several times a week. There's some magic in that. I recommend having a start and a goal but taking different paths and exploring. Listen to some pods sure, but also explore and think. Most important though, put in those 25 k + steps, and do it in a pace you like!