Be sure to ask him about deformities due to location, depth and size of your scar.. I can only tell you that my scar from surgeries is a bit deforming but that is partially due to the scars that I build, any cut or surgery builds weird, angry scars for me. I like to think of them as the visible memories of my life.
I would also encourage you to talk to your doctor frankly about your body image and the depression, if this doctor cannot recommend help, ask them to send you to someone who can. There are ways to reconstruct after breast surgery if there are deformities, and honestly I don’t think any of us gets through the treatments without some depression. Even those who have never had depression can struggle mightily with breast cancer, better living through chemistry (antidepressants) aren’t always a bad thing, you are going through a lot.
Do you have a list of questions ready for your appointment?