To sign up for a certified nursing assistant program, you must contact the school and request an enrollment application. Some schools provide applications online, but others do not. You might have to visit the facility to pick up an application. A deposit is usually required to reserve your seat in the class. You must contact each program yourself to ask about the length and cost of their classes and decide which one is best for you. I could help you locate several training courses in your area. Please provide your state and county information if you need help locating nursing assistant courses close to where you live.