Cipher This!

As is often the case, I have to figure how to do things myself.  Frustrating, yes.  Knitting, painting, sculpting, sewing, carving, writing, cooking/baking...I would much rather have someone show me how.  It would save much trial and error, research, etc. I want to make my own cipher to use on my prints/artworks.  After several hours of attempting the smallest of workings and carvings, I had to drive to the city/crafts store yet again, for more supplies and another third attempt. I am the poster child for learning from mistakes.  I know I'll finally get one, but this journey is not more fun than the destination.