First of all, I think it's important to say that I wouldn't get too hung up on the labels, just love who you love and that's okay!
But in the context of religion, it does become more tricky, because it can feel like you're having to weigh up which one is important to you if they can't coexist. You'll probably have an idea of how your family will react if you came out, so there's that to consider. Though remember that a lot of people do question and think about this, but many times it does come to nothing and they're happy as-is. I think the only way to really know is to actually have a relationship and see how that feels, but again, there's the backdrop of religion and family. There are LGBT+ Christian groups around, so that could be an option for you x