Nipple piercings

Okay so I've been wanting to get my nipples pierced for awhile and have a few questions before I actually take the leap to get them done. I'm super self conscious of my boobs bc they're large and starting to sag and I'm only 17. Also my nipples are always soft bc of their size (36DD). I was wondering how long they take to heal. Also what kind of bras I can wear right after I get them done and if anyone with larger boobs has nipple piercings and like them. I'm worried they're going to look dumb but I really want them. Any advice is appreciated!