If you want to do it, there's no serious financial burden, and you're unhappy with what you're doing now, I don't see why you shouldn't. You kind of answer your own question in this one: "I want to reach my educational potential." It sounds like you've been thinking about it for a while, and that you're ready to give it a go. You shouldn't look at everything building up to now as "a waste of time", though. Maybe that's how you feel right now. But maybe you should try to see it as just another kind of education. It sounds like it has helped you come to terms with who you are and figure out what you want to do with your life. You've grown as a person as a result of it, meaning that it's not really failure, at least not in my opinion. I wish you the best of luck, and I hope that this time around, things go well for you.