Safeway is usually pretty safe, especially the ones near me. 72nd and Portland and Canyon are pretty good about OC. Just carry on with your normal affairs and enjoy! You must live pretty close, so mayhaps we'll meet up sometime.
I remember my first OC! I believe the first day I had spoken to an LEO as well. It was funny, but nothing to worry about. I was nervous, but the nerves go away with time.