is this an achievable goal pls im really committed

Hi im (F20) trying to loose some weight. I used to be a pro athelete and now I am not as my university doesn't offer my sport. I still workout but eat like shit. I decided this summer that since Im home and all the food I eat is very healthy at home ill put in extra effort to loose weight. So im trying to Loose around 15 pounds. Is that an achievable goal?. Ive already been focused for a week now and lost 1.5 pounds. For reference im 5'7 and 140 pounds.

so after 2 years of eating like crap and working out but not consistantly. If I stay on track by working out 5 times a week and being on a diet is it an achievable goal?

TLDR: im 5"7 and 140 pounds and wanna lose 15 pounds this summer by working out 5 times a week and eating healthy. Is my goal achievable.