I'm sparx's mom and didn't see this thread until today. I'm assuming you already had your interview? How did it go?
As for credentials that someone mentioned, in my state you are certified by on the job training. You have to have a certain level of education, but for the job itself, that is learned once you are hired.
If you have any questions, let me know. I love my job, it is hard, and it is not the job for everyone, but I wouldn't change it for the world!