I seriously got to look into studying a career/living independently because I can't keep living like a prisoner in my own home. What should I do?

TLDR: to save you the sob story, I need help in learning to be a functioning independent adult. I want to learn a skill so I can get a i work from home job perfect for a socially anxious individual so that I can later move to South America again. This is certainly not the best place to ask for advice but, I am a 20(M) NEET turning 21 in a few months that got a little emotional after a family argument caused by a CPTSD trigger, and frustration that I am not allowed to do basic things like cook simply because I do not have a job. I have worked before in warehouses (because I have extreme social anxiety to do anything else) and have a drivers license (no vehicle though), but I haven't learned anything to benefit me intellectually nor went to college after work, just sat in my room for the last 2 and a half years addicted to playing games/web surfing sometimes late into the night. My brain is rotted, to say the least, I can't concentrate on anything, and I have to depend on my family for stuff like finances and making doctors appointments. What I really desire right now is to just learn something that I can work from home so that I can move back to my parents country in South America (I am a dual citizen over there) and to get away from the toxicity/madness here in Florida. I just don't want to go back to breaking my back for $15 an hour dealing with homophobic blue collared workers that don't have much of a mind for anything. Problem is I do not know what to learn, I never thought of my ambitions, all I can say is that I don't want to have to deal with people nor numbers (I am only good at basic arithmetics). And of course, reality is you need experience to do a job so its basically causing my mind to break a little. Overall, my life situation was caused by own doing, now I just want to UNDO it. To those that had or have (because I know NEETS aren't the only ones reading this) intellectual pursuits or careers, what do you recommend I do that isn't a pessimistic idea like "embrace the inner NEET" or commit suicide? I'd really appreciate some pointers on what I can do right now.