Hello Hlgrogan and welcome.
I hear you loud and clear and can relate to what you're expressing.
It's almost as if depression(at times)just decides to place an immense blockade in the way of progress.
In times like that,please remember the things you go out of your way to do for others.That extra exertion of energy is healthy,as you are doing something,which trumps being sedentary.
I recall going through the rooms of AA(Alcoholics Anonymous) and repeatedly hearing:"bring the body and the mind will follow" and "keep it simple."
I tried to apply it to my depression;thinking long and hard.
After much deliberation with myself,I realized that I over-think too many things.There has to be some sort of simplicity to things but I have to find that missing key element.
I began using both famous and infamous quotes,as a means of attempting to motivate myself.After a while,concepts began to sink in and I had a reason or two to help push me forward.
Hope it helps to place things in perspective;food for thought,if you will.
Know that we're here because we care.