I did my first in a tank top and try tri shorts since it was a reverse. I then bought the TYR tri-top…at the time it was cheaper than their no sleeve one piece…but guess what, you can get that for 105: https://www.tyr.com/shop/tyr-men-s-competitor-tri-suit.html
Also, I don’t believe in going sock-less. If you aren’t training sock-less, don’t just randomly race sock-less.