Bisexuality man

Hey I’m 15. And I have a predicament, I’m pretty sure I’m bi. The only porn I watch is girl on girl, I’ve tried to watch guys and girls but yaknow I just think it’s gross. I wanna try to actually have a relationship with a girl but my family gay-shames. (Is that a word? Lmao whatever) and they’re super Christian they’re against homosexuality basically. And if I tried to tell my friends they would judge the frig out of me too. There are girls at my school that are pretty and make me nervous when they talk to me. And I just idk. I’m help me plz