Start training immediately. Especially since she did not have those formative weeks which are incredibly important to a pups development.
I saw in your other post that the dam died and the owners just wanted to get rid of the pups. That is a horrible situation, and pups from those kind of situations tend to require more training. My boy Camo was abandoned at 1 week old, and hes been a handful, but is maturing into a wonderful dog now!
Post up some photos of Nina!