Welcome to YT! I hope you'll not hesitate to post in the future, as you can see everyone is more than willing to help
You're already way ahead of where I was when I got Finnigan. You've already found YT and have the wealth of knowledge in these threads at your fingertips and plenty of supportive members to answer any other questions you may have.
I don't know if you've answered this question already or not, but is the breeder willing to keep the pup a couple extra weeks for you?