Artificial inseminations have been around for years.
Not seeing dad just means you need to ask questions
of his owner perhaps. Get his info from the breeder.
Call him .
DANGER ALERT: It's almost humanly impossible
to look and play with puppies without taking one home.
CAREFUL. Dang, it's making me want another one just typing about 'em.
Your current breeder contact sounds fine. Home inspection
will answer if the rep is true.
Puppy training tip: To keep our pups train to our boundaries
out here in the woods we use an old tip and old timer
once told me.
Drink a lot of

hook the pup to a leash and
ya'll mark it off together. It works. They'll check those
"sign posts" thereafter and "get" the idea of your pack's
range.

Send 'em to school. I like 6 month old pup course followed
by re-enforcement and advances when they are a year
or so older.
Two most vital things for great doggie times. They MUST
obey the "come when called" command and understand
"NO!".
The ability to retrieve a dog via command will make your
life a lot easier.
"No!" covers a host of doggie sins.
NEVER strike your dog with your hand. Discipline is necessary
but your naked hand hand is a BAD choice.
Good luck.