A good pup, working hard will cause pain in the fingers. My youngster will work for kibble. My older dog works better for the rolls of dog food cut into small pieces. Little bit of steak will work, too. However, better treats = higher drive = more bit fingers....
I teach most things by waiting until the pup volunteers the behavior. Then I name it, praise it and reward it. Haven't thought about whether or not my dog backs up to sit or walks forward to sit.
Don't worry about teaching the "wrong" thing - pups are flexible. She'll just figure you changed your mind (again.)