I was wondering about the yeast. So far, from what I have read the suggestion is to add it to water first. But the majority of videos I have watched the person just sprinkles it on.
Either way will work. It is optimal if one properly rehydrates the yeast according to the instructions. However, there is a danger of killing the yeasties if you do this step incorrectly. (E.g., water too hot, proof too long...) I believe as a result, kit makers and others suggest that you just sprinkle the yeast on the surface.
Trust me, the yeast fill figure out what to do!