How does Zendaya Coleman Keep Her Hair So Nice?

I'm Half Black,Italian,Indian,and Dutch. My hair is Totally Gorgeus When It Is Straightened. But when I get it Wet it's like Totally horrible,it's this huge Afro. My mom says it looks cute,I don't think so. I just wanted to know how I might be able to tame my hair xD other than relaxer,that will make me go bald. My hair is very sensitive. I'm elevan by the way xD