^ This post is pretty much what I would say. Forget steps. Forget tips. It's all about the inner game, the mental world. She is your goddess. Your queen. Your absolute shrine to beauty, arousal, love, and pleasure. With this in mind, do what you feel like. I guarrantee she will love it.
I don't think you can be too thick to wear a cock ring.. most of them are adjustable. The one I have has 3 different snap-on buttons and the loosest setting is pretty damn big. It's supposed to be a little bit tight- that's how it keeps the blood in the penis.
This guy is seriously huge around, it took me almost a hour to get him in the first time. I've never found one that would fit him.