Struggled curling my naturally curly hair

I own and use a  Pro Hair Styling Iron.   My hair is dead straight but my daughter's hair is curly, shoulder length and she has one also.   We learned how to use it by watching the reviews on the website.   I use mine to lift crown and curl under the rest of my short hair.   Sam uses hers to either straighten or increase the curls, whatever takes her fancy at the time.   Look and learn, good luck.