I'll take a swing at it. My drawings may approximate that of Koko the gorilla (Who had better composition) but I can certainly try.
I don't think that what I want is too complicated, except for the fact that I want the engagement ring and wedding band to interlock. I can't have been the first person to think of that.
Neither of us are much into jewelry really, so they will likely be for ceremonial/dress purposes only.
The idea of getting a band tattooed on has merit I think.