Understand what their bladder can handle. Log how much time passes by between bathroom breaks and accidents. This will tell you what their bladder is capable of and then all you’ll need to do is take your puppy outside right before that amount of time has passed, and slowly build on that with time. Anytime your pup has an accident indoors, prevent like nothing happened and move on. Other than immediately (calmly) taking your puppy outside, there’s nothing you can do to undo the accident or to help your pup understand that what they did is wrong. I don’t recommend ever correcting or punishing your puppy. Anytime your puppy DOES do his business outside, praise, praise praise, and praise some more!

To stop indoor potty accidents, you will want to log the amount of time in between pees/accidents so that you can see how much time your dog’s bladder can handle. Once you know, you will need to start taking your dog out for potty breaks before that amount of time is up, and slowly increase it with time, to strengthen the bladder’s capabilities. The key is to focus all of your attention on when you dog DOES pee outside, in order to encourage your dog from doing it again and again. If your dog has an accident indoors, the best you can do is take them outside without reprimanding or correcting and moving on!

Does the door currently represent the feeling of calm? Or rather excitement? Put it this way, most associate lullabies with sleep because that’s when we heard them and were also feeling sleepy then. And the way you got to feeling sleepy was by doing things, both with your mind and body. This is what learning by association is and dog brains are masters at that. Create the association of calmness with the door and everything revolving it, in the same fashion. This is how you calm him. Otherwise you will mostly find answers here revolving what to do as a reaction to, which can work but you’ll have to constantly do it as you wouldn’t be tackling the core issue which is how your dog feels about the doorbell. Barking is just the symptom of it all.