It's totally normal that you want to use puppy shampoo as soon as possible, especially since puppies always seem to get dirty. However, proceed with caution! It is recommended that you only start to use dog shampoo when the your puppy is at least 3 months old because there will be less chance of getting sick from temperature changes.
Also, you shouldn't just use any old kind of dog shampoo because your puppy needs a suitable shampoo for their delicate skin and hair. So, if you have a cute little puppy, look at the label that indicates it is suitable for young dogs. Remember: try to adapt the purchase to the type of hair and special needs of your dog. Even if it doesn't seem important, everything matters when it comes to using dog shampoo.