First of all, I do feel sorry for your aunt.

Second, I think you lack maturity and motivation to do things on your own, so you should probably follow a very structured activity, that provides you guidance and builds gradually your self-sufficiency. Probably the best option is a kind of apprenticeship where you would benefit from the guidance of a mentor, which can support you in a more personal way. Here is an example of such a program: http://www.ccbcmd.edu/ceed/apprenticeship_faq.html

As you can see, you can also earn a degree in this way. I think that by joining this form of education you'll slowly re-enter the active world, and regain the self-esteem you are sorely lacking.