Summarize:

It can be overwhelming for a dog to meet a large number of people while it is adjusting to a whole new life. Instead, only have direct family members at home when the dog arrives and make sure that they give the dog some physical space while it adjusts. Tell potential visitors that they will need to wait at least a few days before meeting your new dog. Give it physical space and don’t get it excited by being loud or active. It’s best just to promote calmness and make activities as routine as possible.  Don’t take the dog to a dog park or crowded street for a few weeks after getting it. You need to know how the dog is likely to react to these kind of environments before taking it to them. Don't overdo it with physical affection or playing right off the bat. If you tackle your dog in a way that it sees as beyond just playful rough housing, it might get defensive or aggressive.
Minimize the number of people your dog meets. Remain quiet and calm with the new dog.