Try to lose some weight first, then see if you satisfied with your breast, if there will be kind of hard gland beneath your breast, so the surgery will be your option
Personally, I had the surgery 5 months ago, it was like your case, I did only lipo without and excision, since it was just fat in my case.
I can say it does'n necessary that you should have gland removal if your breasts are big, it could be just fat.
good luck