I currently have 3 nipple piercings (I have two piercings in one side), have had them for about 10 years. They healed fine, but be prepared for a few uncomfortable weeks. For me, it didn't really affect the skin around my nipple at all. My nipple is a bit bigger and more sensitive than before, but that's about it.
As the others said, wearing bra kinda hurts until it heals. Not wearing bras was also a bit uncomfortable at the beginning too, so what I did is wear a bra slightly bigger than my size that I had around, just so my shirt wouldn't rub against them. (not that doing it is necessary, it was just what was more comfortable for me).
My first nipple piercing took long to heal, I think more than 4 months? But that's because I kept on laying on my stomach. Don't be me. The other two healed fine, in like a month or two I could barely even feel them.
(Also, sorry if my wording doesn't make much sense, I'm not a native english speaker)