You won't have a bit of trouble with a puppy that age bonding with you. Go for it!! These dogs are very much people dogs; I think our dogs are more happy with human company than dog company most of the time. And, as an extra bonus, you may get a puppy that is close to housebroken if your breeder works on that.
In fact, we retired a boy from our breeding program that was about 6 years old. Just tore me (and especially my wife) apart, but there are limits as to how many dogs we can have. At any rate, even at that age that boy bonded with his new family and there was no question they were his family in a matter of weeks. We see him at least once a year when they bring him here for dog sitting over Christmas and there is absolutely no doubt they are his family now.