& Welcome to the forums,
Personally I'm not sure how you sleep at all with a C-pap machine. But that's okay, because that's not what you've written about.
I'm not sure I can be of much help. The only thing I can think of right now, is about routines. I get told about routines being important all the time. I'm not so good at implementing them. When you were working you would have had a routine, as you said, because you had somewhere to go & something to do.
Practically speaking, you need something to do, someplace to go, perhaps as well. The something to do can be right there at home, if you like. The soemthing to do I think maybe could include a small group who meet somewhere, regularly, even if only to chat, but to share an activity would likely be better.
Or, if it is permitted, if having someone who relies on you, someone who you are 'accountable', or might I say, responsible for, like a new fluffy friend? I know this from having my own fluffy friend: you gotta get up for them. There's no two ways about it. & they give so much in return, while you are providing basic needs, & then some, because they are so lovely being with.
If I didn't decide my own place is simply not suitable, I think I could get another fluffy friend. I miss my own cat so much, & how good she could make me feel without even trying.
Once again, welcome & I hope we will chat again, soon.😸