This is a really tough situation Emilee. It's one everyone here can relate to in some manner. It's not at all unusual for some family members to seem at first accepting only to find them later appearing resistant, distant, and even downright hostile toward you once things have set-in.
In my early days before I was willing to commit to transition but seriously thinking about it, I was at a support group meeting. One of the attendees - after I had given my desires of dreams.... post transition - told me directly, "You have to be willing and ready to lose everything in your life in order to make this work".
To say the least, I was somewhat stunned. To say the most, I thought she was just being mean. But what has turned out is that you have to make the most of what it is that YOU need. Not what you want, but what you NEED. Ask yourself:
1. Is religion and acceptance in my local church enough to keep me from transition if they disapprove.
2. What will life without familial contact be like and is that reality something I can actually live with.
3. We all say, "I don't care what other people think about me". But, do you really? Think about it.
4. Is my source of livelihood going to be jeopardized, and if so, how can I repair that displacement to help myself prosper.
You're likely to lose some family members - permanently.
You're likely to lose friends - permanently.
You're likely that you may find another church which is open to you. Very likely.
Employment is still the biggest bugaboo for transsexual and transgender people. I'd suggest making the most out of any education you have or are intended to get to enter employment as self-sustaining as is possible. But, realize that if you have a job now, you may not post revelation.
In all of what you wrote, it appears your family life is very meaningful to you and it breaks my heart that you're suffering in this way. Honestly, they (your family) already know this. And, they are willing to make their points in order to alter your intent by being mean spirited, angry, hurtful, disinterested, and in denial. Do yourself a favor. Accept this part now, 'cause if you don't it will only make you feel worse later. Don't let them know how much you're hurting. Sometimes, them seeing your hurt only makes them fight and carry on harder.
Only battle the things you have a chance to make changes to. Let the rest go.
We all hope in time our families will see us for who we are. Many will win a few back. But, only a few will win all back. Be content to have any family who does believe in you - even if it is marginal.