Nipple piercings- QUESTION

I wanted to get my nipples pierced, but I have such awkward nipples. They are inverted, meaning they’re not hard all the time and don’t come out unless it’s cold. I saw people say that the piercing helps their nipple stay out all the time now! But my question is, how do I call a tattoo/piercing shop asking if they have experience piercing inverted nipples? I’m so embarrassed that I have these 🙄😩