Unlike many of us who are dealing with mental health issues, you are at least not alone, but Also have one who is an example how to get thru life: "toughen up butter cup."

BUT How does one?
THAT is the question that lies underneath most such questions. An Apparent answer-of-sorts, but not really one could make much use of.

I have asked this question: What does make a person feel get interested In Life -- which often is made up of ups and downs -- I've had three (longer) downs and three ups in my 80 yrs -- and have my share of some old age issues like poor eyesight and slowing comprehension.

But each day I Plan what I need to do if I am to be prepared for a future that looks closer to what I'd like. It is This focus, no toughening up, no being responsible, no therapy/meds, but what I Myself can still do to maintain myself in best possible health to avoid the dreaded life I face If I did Not do what I still can.

You've said, "I no longer find joy in anything I used to do," well that is a good news: YOU have KNOWN what an Enjoyable life was. Can you think back HOW that transition took place? This might give you insights like the gifts we all are born with -- curiosity, play, friendships -- which when ignored, we pay a price, Various kinds of life-problems descend upon us, especially Disinterest in life. We all often can look after our food and physical activity areas, but we Can't do if we don't have friends. That's one area I spend most time figuring and planning it out each day. I've already planned a book club, a library social and a community talk on mental health in next few days. I do it because if I did not I won't forgive myself for such mistake that would be irreversible as I'd be older and less able, mentally and physically. But mostly, I am driven by the Prospect of a More Interesting life With Friends.

I hope you find the flame of More Interesting Life soon. I don't see why you won't!