I know it's exciting and hard to wait but waiting until the second set of shots might be a good idea. I would also recommend moving all your furniture to make sure there are no hidden items (like dropped pills and such) that your puppy could discover in places you can't see. Also, be sure to puppy proof your home against electrical cords or anything your pup might want to chew that could harm it. Having nutrical on hand is also good idea in case it experiences a sugar level drop since yorkies are prone to hypoglycemia.