LOL! Emma will probably find you to be a slow learner as most of our grey's do. However, they can be patient when they have to be Isn't it fun though? All those things you CAN understand are so interesting. It never ceases to amaze me how they can use language appropriately.
It's hard to say what she wanted when she said "want to take a bath." That would on what she was used to in her previous home. I always say "want to take a bath" when I spray Timber (he always wants to be sprayed). But, he doesn't take a full bath until he is ready. After I spray him, if he goes to his water bowl and starts tossing water over his shoulder, I know it is time to get the pan for him. You will learn by trial and error. Take Emma to the shower and see how she reacts. Who knows if she bathed in shower, in a bowl, or in a pan previously. A lot of it is hit and miss, but you are doing well!