I'm curious about the effects of breast fat grafting!

I am in my 20s and interested in breast fat grafting. A friend recently had the surgery and told me she was very satisfied. However, I am starting to worry about swelling and pain after the procedure, and I am also curious about the recovery process. I would like to know which clinic is best and what the actual results are like. If anyone has actually experienced this, I would appreciate it if you could share some specific information!