I have been there. I have been the person changing my outfit nineteen times to see which shows less belly rolls, and I've been the person sitting out a game of volleyball because I'd get too winded to play.
So I picked up women's health magazines and did what they said- went on the elliptical several times a week and ate low-calorie. Spoiler alert: it didn't work and I yo-yo dieted for YEARS trying Special K (remember that fad?), Slimfast, Weight Watchers, and the list goes on...
THEN, I found the amazing combination of strength training and tracking macros and my body changed. The actual composition of my body changed and I saw lean muscle develop and the fat melt away.
It is not an exaggeration to say that this was life-changing because of how drastically my quality of life has improved since getting control over my health.