Pictures of tiled shower and floor
Here are several ideas https://www.hometalk.com/search/posts?filter=tile%20shower
Here you go: https://www.google.com/search?q=tiled+shower+and+floors&rlz=1C5CHFA_enUS723US725&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjAu4Tc9tXhAhVin-AKHcRIDLYQ_AUIDigB&biw=1164&bih=605
When you tile the floor is always first and then the walls are tiled down on top of it. Keep in mind that the floor of the shower needs a smooth pitch all of the way around to the drain (you don't want puddles). Home depot and lowes give classes on how to tile. Here are a few bathrooms that I've done.