I have no education, and I want to go to university..... Where do I begin?

Okay, so I kind of am getting frustrated with my life. I work at a grocery store as a cashier, its really not an enjoyable job. The people I work with are horrible. I eat terribly and feel horrible because of it. The place I live (I live with my parents) is a complete dump. I don't have any education at all. My mom homeschooled me, without the schooling. I basically sat around and did nothing all my life. Now I am 19, I have been working for a few years, I have a car, just no license to drive it, and I have a few friends and my boyfriend. So I kinda want to start making my life now. I want an education. I have been juggling between nursing and photography. Trouble is, I don't know where to begin. I look on the university websites and nothing makes any sense to me. I have no education or any diplomas from high school or anything, so I don't know where to begin. Can someone please explain to me the steps in which I will have to take in order to enroll in university given my situation?