Isolating your puppy in the house and yard during their critical socialization period of 4-16 weeks is a big mistake. Lack of puppy socialization during the critical period of their life is the number one reason they develop serious behavior problems as adult dogs.
Here is the link to a resource on the importance of puppy socialization from Robert K Anderson, DVM http://trainyourdogmonth.com/wp-content/uploads/2019/12/APDT_TYDMRKLetter.pdf
Here are some great places to take your dog for socializing, enrichment, and practicing obedience commands with distractions. These stores require your dog to be on a leash, but also consider parks and other outdoor places to socialize off-leash.
This is just a short list of indoor socialization stores where you can bring your dog or puppy. Be sure to contact the store in your area before going, as individual locations may have specific dog rules.
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RESOURCES:
Podcast Website: http://puppytalkpodcast.com
Sponsor Website: http://www.topgundogtraining.com
Dale's books: https://www.amazon.com/author/dalebuchanan