Man Doukie, how much courage do you have to open up like this and share your deepest feelings with everyone, big up!!
I feel you bro, I am 36 as well and have an injury here and there as well and when I go to hard adventuring I am wrecked as well and need heaps more time to recover then i used to... Marie jane was my first love to and I still see her a lot but lately I try to eat instead of breath her which feels more healthy :)
The 3 biggest things that help me in my life is healthy food ( not much sugar, meat, fat, dairy or bread), a good nights rest, and movement of my body ( main thing YOGA, yoga every morning and I feel good, little walks and hikes in winter, some swimming or riding my bike in summer, that`s all a person needs!

Again this is a very powerful video, I hope your surgery goes well and keep putting in good work towards yourself Doukie!!