How do you find a skill you’re good at?

I'm just curious how do you find a skill you're good at that is at least sellable to others? I don't want to bore people with too much of my details, but I'm 40 and have failed everything I've done past maybe getting my degree online 5 years ago because I was motivated to travel. I then traveled overseas and had a pretty big breakdown as I realized I couldn't teach with ADHD and anxiety. I tried to get out of teaching back home, but to avoid stuff like retail, I moved on to a support role as a teacher assistant. It's very fun doing that, but the pay isn't a career level job.

Some other skills: Video game addiction, but I barely have any time for it, sadly- if I had a million, that's all I would do is get a tiny house and just game all the time. I did graphic design in community college- okay on the technical side as I was the only one that would measure things out, but I was terrible where it counted the creativity. Also, I recently got into growing shrooms for my depression, half of which usually fails- I can only see this being a thing if they legalize the stuff eventually, but that won't be for a while.

The only thing people have complimented me on is my housekeeping skills – Actually speaking that, when I trashed that apartment overseas because I was too lazy to keep up with the recycling, I cleaned the place up on a weekend. The director said you're very good at cleaning up, you should do that but teaching isn't your gift.

IDk, I look at Entrepreneurs, and a lot of it is people who have truly gifted skills usually backed up by job experience, such as trades or web design. I sort of look at myself for a skill like that and realize I offer nothing on that scale. I was wondering if maybe there is a way to find something you are good at and is marketable to others. Maybe im overlooking something, but usally everything i touch pretty much breaks and I get yelled at!