Congratulations! You might want to ask the breeder for a small blanket or towel that has his mother's scent on it, he can sleep with it until he adjusts to his new home. I also put a bigger stuffed dog in the puppys bed along with the mommy blanket so they feel secure since puppy's like small spaces. Are you training with potty pads? If so stock up before you pick him up!
Good luck!