There aren't any places where I live that have puppy kindergarden. I am all the time taking him to meet new people. I am trying to get him really socialized. He has heard some bigger dogs in the neighborhood and he is frightened of the sound, but we have not had to keep him on a leash when we take him out. I am sure he would walk right up to one of the bigger dogs if it was loose. But we do put him on a leash when we take him for walks. Other than his occasional growling at me, he really is doing very well. He is 90% potty trained to go outside,---if I would let him out when I am supposed to---
and he already knows how to sit and laydown. I am very proud of my boy.
I have tried to find places with puppy classes and other things like that, they are just not available in my area.