I don't remember where I carried first. But I do remember worrying about what to say to a DPS officer if I got stopped. I had heard differing opinions on what to say/ not say. But my first experience with them I just tried to be polite, and let them know that I was carrying. No problems, no hassle, no fear, no judgement.
I do remember where I open carried first. I went to a liquor store the first day it was legal carrying my 1974 S&W 28 that I bought new. The manager of the store came up to me with a big smile and said, "You're the first one."