Just wanted to wish you well with this. I think you are going to see some really great changes.
As far as being always hungry, it could be because she is a growing puppy experiencing growth spurts.
With my boy, especially dinner, he acts more satisfied after a meal. More settled even though he does ask for more. I know it sounds contradictory but it's like wanting that second helping even though your full because it tastes so good. Lol.
I think I gave him om from the start or a few days after. he was use to home cooked toppers and a bit of raw here and there when he was kibble fed.
Enjoy the process of the transition and the learning experience it is pretty amazing.
"If you can't see his soul when you look in his eyes, then you need a seeing-eye dog"