Brother,
I know the situation with your family seems hopeless. Don't worry. Trust in the Lord. He will show you the way. Know that you are not alone. Many of your brothers and sisters in the gospel will assist you.
Many of us have not known personally the persecution and difficulties that you are going through, but there are also many that do. There are countless stories of individuals such as yourself who were the pioneer in their family, and were cast off for their choice. Often the familial bond and the softening of hearts through the Spirit help overcome these challenges.
My advice is to do what is necessary to stay safe, as the Lord will direct you. Stay true to the faith - it will guide you and be a comfort for you through your whole life.
I know it's true. I've felt it. The Lord loves you.
Steven Tomer