Poorly defined jawline and chubby cheeks when I smile, what could improve this? (photos)

I am a 24 year old female with a BMI of 19, however, my jawline is almost nonexistent and has been like that for the past decade. I have always disliked my profile for this reason. I also have noticed that when I smile, my cheeks look uneven and lumpy and like a person who is much heavier than I actually am. My eyes also crinkle up a lot even if I try to relax them when I smile. I was wondering what procedures could improve this?