Puppy nutrition in the first months

Hi everyone! We recently brought home our little Labrador puppy, he’s almost two months old, and I’m a bit lost about what to feed him. We’ve had adult dogs before, and I was used to giving them regular dry food, but puppies seem to need something special. I tried mixing dry and wet food, but sometimes he refuses to eat, or he eats too quickly and then throws up a little. I’ve also read that it’s important to give vitamins and watch the calcium intake, but I’m afraid of overdoing it. I really want him to grow healthy and energetic, and I’m curious how you handled feeding during the first months of a puppy’s life.