Yesterday i got a rabbit! He is a house rabbit

Im so excited at having my very own house bunny but i'm afraid that i'm a novice! never had a house bunny before.
Now wires are behind a portable fence so he can't get to them, he has his own cage wth a hammock which he loves

He also has his food but i haven't seen him drink or urinate. Should i be worried?
He seem's bright and happy. He was terrified at the shop but has really come out of his shell. He's a curious, confident little bunny and has been racing around the room, amazed at the space. Today he is a little quieter and i wondered if maybe he is dehydrated
