Fat grafting reconstruction after a single mastectomy?

Hello everyone - new to the community and looking for some advice regarding reconstruction. I am leaning towards reconstruction with fat grafting instead of having an implant because I like the idea of not introducing a foreign object into my body permanently. I have so many questions though and am hoping to find someone else here who has gone through this to hear exactly what you did and what you would recommend!

Some background: After I was diagnosed with a triple negative cancer, the suggestion of bilateral mastectomy was presented to me. However, my surgeon helped me come to the conclusion that it might be best just to go with a single mastectomy for now to avoid introducing any complications from removal of the healthy breast that could delay chemotherapy. I opted for immediate reconstruction with tissue expanders, thinking at the time I would get an implant that would match the size of my right breast.

I only recently learned about fat grafting instead of using an implant. I think that's what I want to do.

I also don't know if matching my right breast in size is what I should go for, because if I have a choice in the matter, I'd prefer to go smaller. But then I'm going to be lopsided. I keep thinking that maybe I shouldn't think that way if I end up having the healthy breast removed down the road, but... I really don't think I'm going to do that. My mother had breast cancer in her 30's like me and she has been doing just fine all these years later. My grandmother also had breast cancer around the same time (she was in her 60's) and is still going strong at 90 years old, no other problems. I am hopeful I will have the same outcomes and am thinking I'd rather not go through another mastectomy if I can avoid it.

But of course I don't want to be.. asymmetrical... either. I'm wondering if I just have to be prepared to be unbalanced anyway with fat grafting, as I understand some of the fat gets reabsorbed after surgery and it could take multiple surgeries to get the right outcomes.

So if you've had a single mastectomy and had this done, what was your experience? Many thanks for any advice you can offer!