I first started learning about mythology in high school in my grade eleven English class. It was Greek mythology, and at the time I was more like, "Enh, it's fun but not likely something I'll really get into." Obviously I was wrong. By the end of the semester, I wanted to learn more and nearly literally fell in love with the subject, and at the start of college I started to branch off into the myths of the Romans, the Norse and the Celts as well. In that same college class, I also came upon fairy tales which I love studying just as much as mythology now.
It's amazing what you can pick through school, isn't it?