Certified Nursing Assistant is the full name and depending on state training will be provided by American Red Cross .
One of my relative was working in adult care facility and advise to take this training will be getting at least 1 to 2 dollar per hour more and will help to increase income. Her answer was irrelevant, she did not wanted to break her back , but she was already in the same field working. 
Sometimes sincere suggestion were not digested or may be  each person has his / her own adviser & would not go beyond against your adviser.