The Pokémon Company International invited me out to New York to play Pokémon Sleep early! I was about to experience the full first day in the game and answer you questions about it. TPCi paid for both my flight and hotel.
If I got anything wrong or incorrect, it's probably because I only had one night with the game and some features of the game required more than one play session, so I apologize if that's the case!
Link: https://youtu.be/rLRn4zK1YOg