Neither of you has to be good at this
Almost nobody likes being photographed, and almost nobody knows what is supposed to happen on a wedding day either. You do not need to pose, plan a shot list, or know the right words for anything. I will nudge you when it helps, leave you alone when it does not, and keep the whole thing light enough that you actually enjoy it.
For a full day I am with you from the morning onwards, less like a supplier in the corner and more like a guest who happens to be holding a camera. I know how these days run and where they tend to go wrong, so if something slips you will not be the one worrying about it. And if what you are planning does not need a photographer all day, I will say so.