What I still need to learn about Journalism

When it comes to journalism, I am still a little unclear about exactly how to come up with a good person to profile. My biggest fear is to find someone who is not important enough. I need to come up with a good reason to interview someone about their life, and I am finding it difficult to think of exactly who. If I choose someone, and write about them, I think there needs to be a reason. I would hate to come up with someone, and have the reader think "So what?"