Welcome to OCDO.
Just remember OC is legal in Louisiana. There are restrictions such as the 1000ft from a school zone which you have to be careful of. I don't OC regularly but it's mainly because I can't OC at work and my wife doesn't like guns. The only time I can OC is when I'm alone and not working, which doesn't leave a lot of spare time.
I have only had one problem OCing. I was asked not to OC in a restaurant off of Jefferson. Other than that, most people just ask if I am a LEO and that's the end of it. Never had anyone "freak out". Most people start OCing with other OCers. If your interested, you could probably hit up one of the OC dinners.
Most will tell you it's how you dress that helps people take you seriously and be a little more trusting. I haven't noticed where my attire affects people. My best suggestion is to find a quality holster and belt. Practice your retention techniques, and be aware of your surroundings.
Good luck and Carry on.