A great place to start, is going to dog shows! From there, you will easily find reputable breeders, who can help you get to know the breed, and connect you with other breeders. Another good place to start is finding the breed club for the breed you are looking for.
When looking at a breeders webpage, there are three things to look for.
Look at what health testing is done. A good breeder not only has their dogs in good health, but has genetic testing done to deter main if the dog is breeding worthy. A minimum is having health clearences through OFA and CERF
Find out what titles the breeding dogs have earned. The breeder should have a clear goal of what they do to improve the breed. Avoid breeders who only breed for money, or aim to only produce "pet quality" puppies.
3.make sure the breeder has a contract requirement for anybody who buys one of their puppies. Usually the contract requires that of the owner cannot care for the dog at ANY time, the owner is required to return the pup to the breeder. Spay and neuter contracts are also a sign of a reputable breeder.
A responsible breeder will not just give a puppy to the first person to show up with the money. They carefully screen homes. Expect waiting lists, questions, and such. A well bred puppy is well worth the time and effort.
you dont ! you adopt!