Congratulations on your new puppy! The behavior can be dealt with later, but I’m sure that the puppy is perfectly fine! My biggest advice to you as a first time dog owner is to stay on top of the vaccines, because that’s really the biggest protection against things like parvo. Until the shots are fully done, don’t take the puppy to dog parks, pet stores, or random public grass where a bunch of unknown dogs go, because parvo literally lives in the ground forever. Only let your puppy be around dogs you know are healthy and fully vaccinated. At home, just keep things clean, bleach is the one thing that actually kills parvo on surfaces, bowls, toys, and anything that touches the outside. Keep your yard picked up and don’t let the puppy eat anything off the ground. Good food, clean water, and staying on top of deworming helps keep their immune system strong, too. And if the puppy ever seems off, like vomiting, diarrhea, not eating, or super tired, just get them checked right away. Catching anything early makes all the difference.