Well hello forum ninja.
It's a pretty big step to oc. Even bigger when you are used to cc from what I hear.
Could do what I did oc in the car. Keep it on when paying at the pump. You can use your car door or sit in your car to help hide i if you get a little to nervous. Eventualy go to lets say Walmart.
That's how I did it. Now I just do it as if its not really there. Except for a few elbow/arm checks every once in a while. Also I use a lanyard when I oc.