I am 26 and have nothing

No education. No career. I am severely depressed. I can't get over the fact that I've wasted my 20s doing nothing. I hate everything I try. Any job I get I can only think about how much I hate life while I'm there. I've lost jobs due to harming myself on the job (hitting myself in the head). Years of therapy hasnt really helped. Applying for disability hasn't worked and I dont want the kind of life disability provides. Right now I work on cars and I hate it. I think about going to school but the idea of graduating and trying to start again at 30 honestly seems pointless and I dont even know what I want to do. I don't really have anything that I enjoy and can do for more than few hours a week. Like I enjoy video games but I can only play them for few hours until Im bored then I don't want to touch them again for weeks. Ans thats how I feel about any hobby I have. I do it for a few hours then Im burnt out for weeks. I hate being around people. I have awful socials skills and I obsess over how people think of me. When I do something I think is embarrassing it sends me into a spiral so I've avoided jobs that have customer interactions. I just kinda feel like I'm at the end of my rope and Idk what to do. I need to make more money as I have to find a new place to love soon but I don't know how I can do that in a way that doesn't make me go insane.