Nutrition nurse

[clarinets, CNA]

Hello, I am looking at possibly becoming a Nurse Nutritionist. I have some questions to ask.

1) Is there an organization for nurse nutritionists?

2) What is it like to be a nurse nutritionist? 

3) What are nurse nutritionists called? 

4) What are the steps to become a nurse nutritionist?

The reason I am thinking of becoming a nurse nutritionist is because I feel like I am actually helping clients improve their health. I did do the Google thing and could not find much.