If you are GOOD at something, do that, my friend. If you have a keen interest in something, pursue that. If you don't know what you want, drink a beer.
Anyway, figuring out what you want is sometimes the most difficult thing to do. You can go back to school, get a degree, and then go look for work. Or you can start a business. If you go back to living with your dad, you could put an internet ad out and be a computer repair contractor, making say $30/hr. Who were your former employer's clients? Tell them you'll do the same work for $25/hr. Think about it.
Davy