Hello and welcome. Your little one is adorable. The biting problem seems to be quite a popular one. I am putting a link to a YT "stick" that is posted in the general training forum. Scroll down and you will see some good ideas. There is also a link to another website article.
http://www.yorkietalk.com/forums/gen...nhibition.html
You are doing the right thing but your puppy is very young and is going to need a lot of training. Be consistent and it will eventually pay off.