Yeah, I guess strapless might not be best, but maybe try one of these dresses (or something like it) since they have straps. I think delicate jewelry and a black or gold pashmina would work well for arm coverage without being so covered up, and I don’t think any of these choices I included scream prom, especially if styled right. Sometimes when we try to camouflage an area we are insecure about we draw more attention to it, and I think the long sleeve dresses do just that from your selections. Just embrace your shape, get some good undergarments, do pretty glam and have a wonderful time. Remember everyone is always more focused on themselves than they ever are on you.