The first weeks with a puppy are exciting and tiring. Your puppy has left the litter, the mother dog and familiar routines. A calm start helps more than a busy welcome party. Think in small steps: sleep, toilet breaks, food, gentle handling and short positive experiences.
The first nights
Let the puppy sleep close enough to feel safe, for example in a crate or pen near your bed. Take the puppy outside after sleeping, eating, playing and excitement. Reward immediately when the puppy toilets outside. Accidents are normal; punishment only teaches the puppy to hide.
Socialisation without overload
Socialisation means learning that normal life is safe. Introduce household sounds, traffic, visitors, handling and friendly vaccinated dogs in short sessions. Do not drag a frightened puppy into situations. Distance, treats and calm repetition work better.
Learning to be alone
Start with seconds, not hours. Give a safe chew, step away briefly and return before panic starts. Build up slowly. A puppy that screams for a long time is not being stubborn; it is overwhelmed.
Keep the breeder food at first, book a vet check and follow the vaccination schedule. For choosing a good puppy before this stage, see buying a puppy.