Effective weight loss diets/exercise

Jillian • Haters see you walk on water, and say it`s cause you can`t swim.
I'm 17 years old and I need to drop a few pounds in an quickish and effective way but I need to loose it safely as well. I have history of an eating disorder so I need something manageable that I won't go over board with. Does anyone have any suggestions??? All thoughts/comments are needed. Thank you
     Jill ☺️