Nipple piercings

I am 17, my birthday is coming up in a couple months and I have really wanted to get my nipples pierced. The only thing is my nipples don't really pertrude like most pictures I see. Could someone tell me how your nipples are supposed to be if you get them pierced and how it feels and if they get infected. You know just some regular facts. But mostly looking for if I would be ok getting them pierced bc of the way my nipples are