I'm not in Nevada so, I don't know how it is there. However, I OC 100% of the time and have had civilians and police stop me several times. I'd recommend finding someone to "adopt" you on your first OCing experience. It helps a lot to have someone who's done it and is comfortable with it to be there with you, answer questions, etc.
If that's not possible then, go to a place that you frequent a lot and know the employees and are on friendly terms with them. In my case, I hang out at diners a lot, it's my quiet time. So, I knew the employees very well and they all knew me. Once I got my permit and started carrying, I went there, hung out for a couple hours, talked with all the employees. It wasn't a big deal to them, they asked a few questions. Me? I was pumped and wanted to brag and talk guns the whole time lol.
I've had officers approach me and were very friendly and accommodating. I've also had officers scream and freak out on me. I hope you are aware of your rights if you are stopped by an officer. You have the choice to talk up a storm with them or you can refuse to answer any questions (Outside of things that are mandatory. Here, if you're being detained, you have to identify).