For me, cock worship is not about a specific act or ritual but revolves around my sincere desire to pleasure Sir and show my love and devotion to him through his cock and orgasm. When I worship Sir's cock, it's almost as if Sir doesn't exist or if he does it's secondary to the cock that I am licking, sucking, and rubbing on my face. I, too, cease to exist outside of a desire to have Sir's come in whatever manner I can get it. This always beings with my mouth and to be honest if Sir ends up fucking me I do not feel like I've properly worshiped his cock, but that's just my personal feeling.
Because it sounds like you are unsure what your Sir wants from you, when you are permitted to ask questions, I would ask him what cock worship means to him. Or maybe express what you think of doing to him when worshiping and ask him if that is acceptable to him.
I'd love to hear how it turns out for you.
Beloved