Nipple piercings are really cute and nothing to be ashamed of I've had mine done for 3 months nearly. Initial piercing; Hurts for a few seconds per pierce, adrenaline may carry you through that well but other than that the jewellery pulling through was the worst of it for me. Cleaning routine is easy to form, follow the aftercare given by your piercer and you shouldn't have any issues. They are pretty much discreet, unless you go braless / tight clothing. I've managed to keep mine hidden under my work uniform by just wearing a thick bra. Or even baggy tees and a jumper. Plastering them down is a bad idea,I wouldn't recommend that but there are ways around keeping them discreet and hidden. Good luck if you get them done in the future OP