Am I straight?

I realized I wasn’t straight in grade 6. Now I’m in grade 9. I’m out to a few close friends as “not straight” and have been trying to figure stuff out I think I may be a lesbian as I have never had a crush on a boy or even liked the look of a boy. But I have never had a crush on a girl only liked the look of them. I get turned on by lesbian porn and scenarios. I’m a freshman in high school. How do I explore my sexuality without outing myself and is this a good time to experiment (not sexually just by dating or talking to girls)?