ESPECIALLY if you have TREATS! lolol Wosie will do whatever I want provided I have a treat in my hand! I have actually begun treating now only occasionally, and she never knows if she will get a treat or not so she still does what I want.
We began the day we got her at 8 weeks, too. Incidentally, one of my favorite tricks for her is to make sure she sits while I go out the door first, and then she doesn't come out until I say OK. That way, she never runs outside when the door opens. I do the same coming inside, too, just to enforce that she doesn't cross a threshold without permission. It's a safety thing.
Training can be a joy for both you and your pup! Have fun!