Trying to be a normal human is interesting. There’s so much to remember; paying rent, proper greetings, being complimentary to the landlord…
Showers are great; all that hot water, and good acoustics for singing. Just have to remember to undress before standing under the water, and put something on when you get out. Towels are good. Wet floors are slippery, and electric toothbrushes aren’t effective weapons, even if you’re in a hurry because someone might be in danger.
Still, the Doctor feels confident that he’s fitting in. He can be just as normal as the next man if he tries.