When you first get a dog, it is all happiness and confusion. You both try to work out how to live with each other. If you have a problem with a family member or housemate, you can tell them. “Clean those dishes.” “Turn down the tv.” It is much simpler with people.
It is not so easy with dogs, cats, and any other pets. Is your dog at the door because they want to go to the toilet or chase the rabbit they saw? Are they stealing food because they are hungry, or they have nothing better to do? Are they licking to annoy us or are they trying to tell us something?
It is hard to understand dog behaviours. Luckily for you there are many professionals who understand dogs. Dogs feel anxiety just like people do and it is sometimes hard to understand the signs.