Hi dear, Inverted nipples are actually pretty normal and is definitely not something to be embarassed about. That said, if you want to make a DIY Niplette, you could just use a syringe. Cut the bottoms off and the plug can be used to basically suction the nipple out.  You could do this for a couple months and if it helps, get the nipples pierced to secure it. And about the odor, that's usually because of secretions from the ducts. Just keep the nipple clean and wear breathable clothing.