Slow down. Those are valid concerns for a breeder to have, IMO. Their responsibility isn't to the customer, it's to the dog. Good breeders go through a lot to ensure a good match for their pups.... and really, they're the ones that determine that, because they know the dogs better than the customer. And, customers are not always realistic about their expectations or capabilities. Which brings me to the other concern.
The other concern is... you have a 13 week GSD and are hoping to get another puppy next week? Why doesn't your daughter work with the pup you have, dabble in showing and agility and see if she likes it, and then go from there?