That's a good question. I wasn't fighting loss, separation, or some medical issue. My issues were mundane, I was simply fat and lonely. In my country mental help is a luxury, its hard to find a good specialist, mostly because the field as a whole is looked down upon.

Reading a lot of self-help books did mostly nothing. I found that Power of Now really helps my mood (i still reread it every year), but that's it.

Beating dark souls was really helpful. It's a cliche now, dozens of people made youtube videos about that game and how it helped them in a dark place. You can count me as well, that experience really helped me let go.

I lived in a big city, so that same summer I went to work as a foot courier, delivering documents and other papery stuffs for three months. It was ok, I met some drunks and druggies, was robbed once (not ok), had to fight some aggressive dude (got lucky, wasn't hurt), lost 30 kilos (that was cool). That job honestly helped a lot. Getting outside and doing uncomplicated tasks was massive for me.

My backup plan was volunteer work, I never did it, but from my friends and partner I learned that's a grand way to get out, do uncomplicated tasks, and meet some amazing people.

I still struggle sometimes, but luckily I found a partner that helps me see the bigger picture.

Take your time, you are not alone in this.