Confused

Hey! I've been wondering things about my sexuality since I was 11. In Middle school I went to a school that was co-Ed from daycare-8 and then the high school was all female (was a Catholic school). While I was there I thought some of the females were very attractive and I was questioning if I was gay or not. Since then I've learned that you can be bisexual and my friend say I'm bi-curious. I've never tried a girl because I'm hard on females and I've never just met a girl who is nice AND pretty. On top of that I like white girls more than black girls maybe because I mostly see white girls in porn idk. Any help/advice on what I should do? And I'm from a Catholic family and my grandfather is a Deacon, we live with him, and he is extremely homophobic and hates gay people and says they're all going to hell so a family discussion is out of the question. Any help with that?