dear courtney,
wellcome! i'm so glad to see you starting to make a change, and a change for life, at such a young age. it is the best decision you can make, not only to look better, but to live a better, healthier life.
as far as food choices, i've noticed reading ang gathering information about food (like superfoods, eg.) effects me in a way that i choose more nutritive foods and find it easier to stay away from empty calories. information is the power.
(english is not my mother tongue, but i hope i managed to explain!
)