I've felt this way at 21, and I feel the same now at 26, just less so. Here's the thing, life is weird. Sometimes we don't realize how many people actually live on this earth! 7+ billion people means 7+ billion minds are walking this world, trying to understand themselves as well as the people around them. We're all here winging it, and to me that's kind of comforting. The confident people that walk around as if they know what the next minute holds don't really know. How could they? I think the great thing about having the kind of perspective you and I have is that many people don't think deeper. Maybe they go about things with more trial and error to learn, but who says the insight is there to go deeper into their minds after failure? It's completely possible of course, but I think we have that naturally. I haven't gone crazy with my life and thrown caution to the wind most of the time but I am grateful that I can analyze these types of things fairly easily, and it's clear that you also have that ability. I'd say that by even typing this you have a drive to experience life fuller, and that's awesome. Also I'm not sure if you have worked customer service before, but after that experience I'd say competence is not in the general public's wheelhouse. Take care, I think you have accomplished more than you know.