There are so many great answers here already, but I want to add one little thing that made a world of difference for me, it sounds a bit cheesy, but I’m so serious, look around. I’d look at the mountains, or watch a sunset, I’d observe something that was inspiring, right around me. Once it was a man in a run down stripmall parkinglot feeding birds.
You say you are on a Greek island. Which could easily be confining and limiting, but I’ve been to Greece and as soon as I started reading your details I was transported to the beautiful cliffs, so harsh and yet such works of art. The sea so powerful but soothing. On another day soon after having to live in my own hell, I was sitting on the back porch and some ants started crawling up my feet and legs.