Raising a puppy myself. So much pee from a little dog. Anyway, it’s too bad he’s paper trained, it’s hard to break them of the habit of going inside once they’ve been taught. (Is he kennel / crate trained at all?) We taught our puppy by keeping her in her kennel whenever we couldn’t watch her (she wouldn’t go in there). A good way is just to get him used to going outside by taking him out frequently, and at times when he usually goes (after meals, after waking up, etc.) Let him be outside until he goes, and praise him for going outside. Show him it is a very good thing to go outside! At this point, don’t punish him for accidents in the house, but he gets no praise unless he goes outside. If you catch him starting to go in the house, distract him by clapping, or tapping him on the butt so he stops, then quickly take him outside to finish, and praise him. It’s important to catch him in the act so he doesn’t think he can get away with going inside. He should learn that starting to go inside will reult in being whisked outside. After enough times, he will associate being outside with peeing. When you think he is starting to get the hang of it, (holding it until you take him out) you can teach him to tell you when he needs to go out. Teach him to speak, or sit by the door, or whatever you want him to do. We hung a bell on the door so she could ring it when she needed to go. First, I taught her ring the bell as a command by picking up her paw and touching the bell when I told her “ring the bell!” and she got praise and treats any time she rang the bell, even accidentally. Then, every time I went to take her outside, I had her ring the bell first, then immediately took her out. She quickly learned that ring the bell=go outside.
The most important thing is to be consistent, you have to take him out every time you catch him, and keep an eye on him all the time at first! It helps to keep him confined to a smaller area at first, a big house can seem overwhelming to a puppy, she may not realize it is all “inside.” If you punish for accidents, they just learn to hide, or not want to go in front of you. Make sure you also clean up any accidents really well, either with a commercial product for this, or you can use white vinegar, so they don’t smell their urine (it’s a trigger for them to go there).
Some dogs really pick it up quickly, our puppy took quite a while before she really had the hang of it. (I think she was 5-6 months before she started being reliable, 7-8 months until she had no accidents at all) Also remember his bladder is tiny now and he won’t really have full control until he is about a year. Just when you are ready to give up and rip out all the carpet, they will suddenly catch on. Then, just when you think they’ve mastered it, they will have an accident in the house:)
Good luck!