How do i come out to my religious family?

You can express your feelings as openly as you can, tell them what it means to be who you are, how you realized you are LGBT, and reassure them that nothing changes in who you are as a person, you're still you though this part of your identity is different than they thought. Make sure they know you want to share it with them because they are important to you, and maybe tell them that you believe in your relationship and you're sure they know that nothing changes in the person you are. You can also encourage them to ask you any questions they have about it, let them express their worries, and explain why the various possible arguments against LGBT have been built on stereotypes and misconceptions. Be patient, it's possible that they'll need more time to come to terms with it because of their views, but what truly means is that they give you a chance to be listened and understood: that's a signal that they're willing to give you a chance.

Religion always makes things tricky. I would say that if you have decided you want to come out to them, you should find some people who are close to you that you want to be able to count on for support. Whether that means they're there with you or are simply available if you need to call afterwards is up to you. And, while I hope it all goes well, try to be prepared for the worst case scenario (not expect it, necessarily, just be prepared) and maybe have a safe place lined up to stay (possibly with the support person previously mentioned?) if your family reacts incredibly negatively. If you have more questions, feel free to come over to the LGBTQ+ subcommunity. Lots of great people there who can offer up more information.

On your own time. You will have to decide for yourself, when, if and how you come out to your parents. Friends and adults who are supporting you should respect your timeline. Ask them to keep this piece of your identity confidential until you tell them otherwise. Balance risks and benefits. Some people choose to come out to their parents (or not at all) when they are older for many different reasons. It is definitely okay to consider your present living situation when you are balancing risks and benefits.