Whilst there are quite a few commands that your pug puppy should be taught, you have to remember that your puppy has so much to discover and explore in this new world.
It will be exposed to thousands of different smells and tastes, materials and grounds. Your pug puppy will meet all kinds of life forms that will all react in different ways upon contact.
When you bring your puppy home for the first time, give it time to sniff around to get to know it’s new living environment.
It is important to get your puppy used to different sounds, especially loud ones. If you have a train station close by, take your pug there. If it gets scared by the noise of a slowing down train, pet it, but don’t pity it. Repeat that a few times and you will have a pug that is immune to most loud noises.
Then your puppy has to learn to walk on different grounds. If you have a park nearby, have your puppy walk on as many different surfaces as possible.
You might also want to take your pug puppy to crowded areas, which could be tourist promenades, central streets, simply areas with a large amount of traffic.
Basically, you should try to show your puppy the world around it, let it get used to it’s environment, without fear.
Remember, pugs are just human, too. 😉