What is best for stubborn fat areas and cellulite? I'm a 54-year old female. (photos)

I want to know the most effective body sculpting and fat reduction treatments for stubborn fat areas (back of thighs) and cellulite (back of thighs). I'm at a good weight by the way. I just need to target the stubborn fat and cellulite on back of thighs and rear-end. I'm a 54-year old female. There are sooo many procedures that I'm overwhelmed. I was thinking Cellfina but from what I read that will only get rid of the cellulite. There are also various body sculpting treatments.