Will I be ok?

I too am large breasted. I had a single mastectomy and chose no reconstruction. I use a prosthesis, find it simple and easy. It may take a little while to get used to, but once you do it’s pop it on in the morning and forget. It’s worth a professional fitter first time. I went to Iceland a few years later and found the absolute acceptance of my body in a shared women’s shower room before a hot soak absolutely liberating. No one batted an eyelid. I would have expected such if I had lost an arm, a breast should be no different. Best wishes for the future.