Hi,
I can understand your trouble with the food. My Cira was the same as a little puppy, she didn´t want to eat. I did a big mistake, trying to convince her, playing around with her meat, feeding her from hand etc. It only made her spoiled and the whole thing was worse.
So my advice is, offer the food normally in a dog bowl, at least four times per day. Give the puppy ten minutes to eat it. If she doesn´t, take it away and try again at the next feeding time. Do not worry, if she doesn´t eat, even if it lasts a day. The dog is too smart to keep itself hungry, especially when offered tasty food (ie meat). She will start eat normally soon.
Oh and don´t forget for yourself, you have to eat first, even a cookie, then you offer the food to the dog.
You are the alpha
I do not believe your puppy is aggressive. If she growls or bites when you play with her, it is a game. Wolfdog puppies are like that. Mine did the same. You have to make the rules, though. If she plays too hard, just ignore her and go away. She will soon realise, that rough manners mean end of game.
If she growls at you above her food, in her "place" or similar events, then you have to improve your alpha position over the puppy. But that would be for a long talk.
Mirka