Bi with homophobic family

So recently I discovered I am bi, I guess more bi curious because I’ve never had experiences w girls?? Anyways. I don’t know how to handle this. My whole family is homophobic besides my older and younger sister, even my stepdad is homophobic. I don’t feel comfortable telling some of my friends either because I don’t know how hey will react. Please please help me. I really just need advice on how to handle this. I’m a junior in high school by the way idk of you need that

Edit: I have asked my mom what she would do if I was gay and she said the would be really embarrassed and ashamed. She also said she wouldn’t come to my wedding if I was married to a girl. I feel like she might kind of know that I’m questioning things. My mom and I are really close and my relationship with her means so much to me so I believe that is why I’m struggling with this confusion.