I'm not sure what is typical to feed dogs where you live. In the US, we have dry kibble bits or canned dog food usually. Dogs are not designed to eat cow's milk. Some do ok on goat milk but we only do that for special dietary need in the US. Once a puppy is weaned from the mother we only give dogs water to drink. We expect our dogs to do their messes outside, usually on a leashed walk (in the city) or in our backyard if we have one. Some dogs in the city who are confined to apartments are trained to mess in a litter box or on a pad. First, every new puppy needs to have a veterinary health check to assess general health, check for parasites (very common in puppies), and any required vaccinations. Then you need to confine your new puppy to a small space like a kitchen with a gate or barrier. When you schedule the food going in, then the elimination will also happen on a mostly predictable schedule. So in the morning when you wake (assuming the puppy is sleeping in a box or bed near you) take the puppy to the place you want it to eliminate right away when he opens his eyes. Then feed the puppy in the confined area and keep him there for an hour or so. You can interact with him, but keep him in the safe area. Then about an hour after feeding take him to the elimination place again. If he does his mess be sure to have an immediate treat for him and throw a little happy party. Return the puppy to the safe place to play or sleep. Give him plenty of water with meals but just a little available in a bowl between meals. I usually feed puppies 3 small meals per day until 4 months old, then two meals each day for the rest of their life. Your puppy will probably sleep most of the day right now. Be sure to take the puppy to eliminate as soon as it wakes from naps or after playing with you. Always try to potty the dog 30-60 minutes after meals, always on waking, always last thing before bed. He may also need a potty break during the night. Good luck!