Welcome to the Daily Puppy. May I suggest that you spend some time reading the Behaviour & Training section as you will find most answers to your questions in there. We generally use the Introduction Section for simply that, an introduction.
I have also attached a link regarding nipping/biting/ and generally how to train one's dog when it comes to any high value treat. Here is the link:viewtopic.php?f=6&t=6705
Good luck from Oliver & Henry, and their Mum, in London, Ontario.