My daughter has fuzz on her nape of the neck, she's turning two tomorr…

My daughter has fuzz on her nape of the neck, she's turning two tomorrow and we've never cut her hair before. Can you tell me how this fuzz will straighten up? Or should I get it trimmed? I can't even imagine what it will look like after two years. What do I do? Also, what shampoos do you use for girls? We have sanosan 2in1, maybe I need to use shampoo separately?