When you get a new puppy one of the first things you are going to do is to potty train them or else you will have a mess in your house. A new puppy means that you are going to have to spend extra time to watch them until they learn and understand how and where to go to the bathroom. You want to get them into a routine with their food and exercise because this will make it easier for them to know when to go to the bathroom. When they go to the bathroom for the first time you need to rub there nose in it and tell them no, then the next step is important. You need to take them outside or to the dog door so they know they need to ask to go out.
When they go to the bathroom outside then you need to give them encouragement and let them know this is the right thing to do. They will make a few mistakes when it comes to first learn where to go to the bathroom but they will eventually understand and when they do it will make your life and there life much better.
You want to make sure than when they learn to ask to go outside that someone is there to let them out because in the beginning they are still unsure if what they are doing is the right thing and they need to know when they are ready to pee.
Remember that training a puppy to go to the bathroom is not difficult to do but you need to be patient and give them positive reinforcement so they learn properly.