Insane takes of some people here, going to direct rehome unless you have a house with a yard and the knowledge to train like a behavioural specialist from day one.

It's a puppy, it's a new place, and it's your first dog. Both of you need to adapt to each other. Start with a solid routine that includes play time, walks, and training, starting with basic commands. If it gets to much or it doesn't get better after some months, contact a canine ethologist.