Those who have lost weight. How much did your boobs change?

I am going to see a nutritionist to talk about some dietary I need to make as I have been struggling to lose weight and want to take better care of myself as my weight and mental health is crying. I am worried that I’ll have loose skin (I’m just have belly, side boob, back and a bit of arm and face fat but Ik for sure my boobs were affected by a ton when I gained weight). For those who lost weight, what is some advice you could give me if I am worried for loose skin? I do plan on picking up more weight training for the upper body.