I have no idea what is really going on with that show, but I am very suspicious of emotional pleas on "reality" shows. As long as this is a publicity item, it probably won't happen. Also, you can not join the Church of Jesus Christ of Latter-day Saints just because you "are willing". You have to take a series of lessons which teach you about the principles of the Gospel. Next, you must have an interview with a Church leader to make sure you understand the principles and are willing to live these principles which include such things as the Word of Wisdom (laws of health) https://www.lds.org/
Here is a good place to learn more about the beliefs of the Church of Jesus Christ of Latter-day Saints.