Welcome to the forums and congrats on having an uneventful first OC.
Most of the nervousness in the general public goes away after awhile. I've been carrying long enough that now it feels unnatural if I'm not doing it. The more you get out and expose yourself, the easier it gets. As far as being nervous about LEO encounters, I'm not sure if that ever completely goes away lol. I've been around a lot of law enforcement while carrying, both walking and while on my motorcycle, and I still get that nervous feeling. I'm always thinking "What if this is that One *******". I've carried past hundreds of LEO's and State Troopers in a single night, and that feeling still hits me lol. So I can't really help out there. Not sure what kind of meets there are in your area, it looks like you're a couple hours away from here, but if you're ever in the Charlotte area, we usually have meets once a month and sometimes smaller ones between those. Being around other people that carry is a good way to put a lot of your feelings at ease, I know it was for me the first time I went to one.
Glad to see you here and I hope the rest of your OC encounters are just as uneventful.