Show Lucky lots of love! And if he needs to be potty trained, make sure you take him outside frequently. Also, if he's chewing on furniture, buy some sour apple spray and spray it on the stuff you don't want him chewing on. It's really bitter, but doesn't harm the dog in any way.
Key word: Positive reinforcement! Also investing in a walking harness for leash training is a good idea. If you can invest in grain-free food for your puppy.