Hamsters are crepuscular, meaning they are awake at dawn and dusk. Especially when they are in a new enviroment they will not get up, eat, run, or drink water until night time. Hamsters only drink about a teaspoon of water a day. Keep an eye on her to make sure she is okay, but since she is new dont try to pick her up. You can learn how to tame a hamster on youtube. As for not being able to afford the vet, please start a vet fund. It doesnt have to be anything fancy, just a jar will suffice. You put a certain amount of money in it every week in case of an emergency in which you need to take your pet to the vet. Not taking an animal that needs medical attention to the vet is a form of abuse.