Hey dbee, welcome to Dream Views. Congrats on having one lucid dream! How long ago was that? What was it like?

I don't think you need to worry too much about doing RCs in front of people. I've pinched my nose in front of my family pretty regularly, and no one has given me strange looks. Looking at your hands/wrists or counting your fingers is pretty inconspicuous too. Someone on this forum suggested doing RCs when you're in the middle of something--such as a conversation or an assignment. In dreams people are generally active, so it might be a good habit to RC while you're preoccupied.

The freckle RC is a good idea! It's always good to find a RC that's specific to you.