I live in the USA. Around 30 percent of the population has a bachelor's degree. It's highly unlikely you would fail the one class you took and no one would know but you; your classmates would be worrying about their own grades. I think you are talking yourself out of trying. Instead of doing that, cut yourself some slack. Have you looked into what the university offers for non-traditional, adult, commuter, or distance-learning students? I'd investigate all of that before I assumed I'd automatically fail. I think you'll do fine when you go for it. Courage!