There's a lot of education required there. There are many other places to do CART work, but this should give you a start. CART preparation is different from reporting preparation because you often know so much more about what you'll be writing. Practice the actual material. If you'll be working in school, tape some of the instructor's classes.
Many churches have tapes of their services available.
Ask what's on the agenda at meetings. Get comfortable with the flow of the material. Build your dictionary. If you'll be doing a college chemistry course or a church service, be ready to add a lot to your dictionary. Focus on word parts, where you get more mileage from each dictionary entry.