Have you been treated for the depression before, Rosa? Are you on any meds now?
I've taken fluoxetine (SSRI) for several years, but I seem overcome lately with acute inertia & barely get out of my chair. "Let things go" is exactly what happens. My doc has now changed my antidepressant to venlafaxine (SNRI), thinking it may restore some energy, so here's hoping.
I rather agree with you that being rid of the depression first could give you the strength to conquer the rest - you have a happy marriage & a lot of reasons to stick around a good many more years . . . perhaps even some grandchildren will come along, which are about the most fun thing on earth!
I just wonder if you should seek a doctor's help in dealing with the despondency . . . it surely couldn't hurt. We're about the same age - so let's not throw in the towel just yet!
And rest assured there are plenty of us capable of creating walls of text, so "this space" is yours for the taking!
I'm a bit of a nightowl myself sometimes.