Biggest Loser Challenge

Hi there, my name is Melissa and I am from Yakima, WA. I am 29 years old, and my current weight is 180 lbs. and my goal is to get to 120 lbs. I heard about the new Biggest Loser Challenge and want to join but I can't figure out how to join it. Can someone please tell me what I need to do. I'm new at this and am not very good with computers and online groups or message boards,lol. Thank you so much for the help!!! I want to wish everyone luck on their journeys to a healthier lifestyle. Looking forward to seeing everyone's progress on Fridays if I can figure this out!