When socializing puppies, quality is more important than quantity. This article is a fantastic reference and had to be shared.
“The rationale for enrolling puppies in such classes is based on research which shows that dogs who don't have adequate contact with other dogs and people during the early months of their first year of age are apt to become more fearful, aggressive, and uncontrollable.” https://www.psychologytoday.com/us/blog/canine-corner/201905/do-puppy-classes-have-effect-later-dog-behavior