Glad to hear it's going well for you. My routine has gotten a bit messed up for a number of reasons. Went on a small vacation, had to isolate because I was at a COVID super spreader funeral (I managed not to get it, somehow, but still isolated just in case because my parents, 2 aunts, 2 uncles, multiple cousins all got it).
But I have also been doing the slow running thing, and enjoying it. I don't find it particularly challenging but it is very enjoyable, just a great way to zone out and disconnect for a while. My focus is keeping my HR under 160, which seems high, but like you I would be in the 180s at my normal pace. For the most part once I am warmed up and find my pace I keep it between 148-153 or so. I can do these runs every day, no problem. It's honestly a lot easier on my body and I see great improvement. For example, a few weeks ago in a 30 minute run, I had to stop 5-6 times because I went over my 160 max (in these cases, I would walk for 1 minute, my HR would go down to 125ish and then I'd start again). This would happen even if I was going at a snails' pace. Now I can go 1 hour without stopping because I never go above 160.