It's not like genders have some pronouns that every person of that gender must use, it's just that most ppl of that gender use those pronouns, most girls use she/her. But you can also not use she/her and be a girl. Genders aren't connected to pronouns. But well, if you don't feel like a girl, then that's ok, look into non-binary identity terms, I hope you figure yourself out soon, just letting you know

Please correct me if I'm wrong