What are the changes like after breast fat grafting?

I am a woman in my 20s considering breast fat grafting. I am curious about how the shape and size of my breasts change after surgery, and in particular, what precautions I should take to achieve natural and satisfactory results. I would also like to hear advice from those with experience regarding care and precautions during the recovery period. I would be very grateful if you could also recommend a trustworthy clinic!