I have a 13 month old puppy and I would like to give him the best DOG food possible. He is a Bichon Frise male, any successions?

I’m a first-time owner with a Bichon puppy. Is it okay to mix dry food with wet food? If so, which two brands are good to combine? My friends who own dogs recommended "Wellness", is this a good brand? If so, can I buy the wet and dry food from this brand and mix them?