Amanda, welcome!!
I love your name... Taco Bella.
I was like you... very active during high school and college (I ran every day), but I ate everything in sight!
Fortunately, or maybe not, I didn't have a weight loss issue until I was in my mid-twenties, when the exercising starting going downhill, and the eating continued.
You're right... you probably don't have a lot to lose, but you're a smart young woman to address your eating issue now, before it becomes something that'll haunt you for many years.
I think it's great that you're doing a challenge with your mom.
I wish you and your mom the very best...
Yes, please keep us posted!!