Personally, I found it already helpful to force myself to go for a walk every few days. In my case, I was able to get rid of my car, so now grocery shopping is my mandatory walk.

And the weirdest part is that I’ll now sometimes want to go grocery shopping, even though I still have plenty food at home. I think, after doing it for a while, my brain understood that the being miserable part isn’t normal/necessary and that the walks do make that better.