I’ve been injured and sedentary too long. A couple of weeks ago I started walking along the bus route until it hurt too much, then hobbled onto a bus back home.
Today I made that distance and back with low/manageable pain.
Next time the same route will be less pain, and soon I’ll try going as far as I can in the other direction and bus back again.

Thank you! I’ve made so many convoluted plans and training schedules and never followed through with a single one, so finally I went “just try it - go until you can’t go more, then stop”.