Nonbinary/Genderfluid?

I am just coming out and finding myself, and with that comes a lot of questions and misunderstandings.

What are the different of nonbinary and gender fluid?

As in, my pronouns are he/her, I feel feminine and masculine and don’t have a preference how someone sees me and refers to me, as long as it’s him or her. I don’t like they/them pronouns for myself. I came across someone saying that’s not nonbinary but I thought that was nonbinary?

If I sound stupid I’m so sorry! This is all new to me and I want to learn myself and more!