I feel your pain! Seriously, I feel exactly the same as you. I used to be a real energy ball, but now I am a shadow of my former self.
Admittedly, I have cancer, which doesn’t help, even though it is slow-growing and not a threat yet, apparently, but that’s not the cause of my lethargy.
I get up, shower (not every day, sadly. Sometimes a top and tail has to do), then have my breakfast and a coffee. I have been advised to walk after my main meal because my digestive system is sluggish, and that is a real effort, not helped by the fact I have always hated walking!
I just feel sometimes that my whole life now revolves around keeping myself alive and it’s scary.