I'd studied 16th century science and magic. I thought it was strange that people were interested in the same kinds of things my research was about. The more I thought about it, the more intriguing it became and pretty soon I was writing a novel about a reluctant witch and a 1500-year-old vampire.
Work hard. And have patience. Because no matter who you are, you're going to get hurt in your career and you have to be patient to get through the injuries.