Here's my thought on this. Find a program (vocational or college) in a city, with more job opportunities, research it, look at opportunities for financial assistance that would allow enough for you to find an apartment or room and move. It sounds like you've tried everything you can where you are at and it sounds like you want this. It won't be easy, but it can be done, and I suspect you will be happier than you have in a long time.

Web Design is a cool field, however I want to throw out a word of caution. It is hard to find good paying web design jobs as a freelancer. There is so much competition from freelancers from all over the world willing to work for $10 an hour or under and there are also many sites offering free websites that many people take advantage of. That said, certain areas may have better opportunities than others with local small businesses that want a website that is more than a DIY site, but who can't afford a web design agency and are hesitant to work with an unseen freelancer.

I would recommend looking in a more broad program, computer science in general, Marketing, Business Admin or other programs. Web Design can be self-taught. You can probably supplement your income with jobs here and there, but I'd be hesitant to count on freelance work as a main source of income. A lot of developers have done well building their own sites and monetizing them, but that can take a lot of time and effort with no guarantee of success.

Good luck with your future endeavors!