Ah, welcome to the world of puppydom!
I'm not going to try and advise on food, but I'm sure someone will be along soon!
My Mum has had he little Bailey (10 weeks today) for just over 2 weeks, and he loves the light mornings too. I'm thinking thats the way with puppies. And generally, as soon as you give in and get up, they decide it's time for a snooze!
It'll not last forever, just look on it as "your time" with him, and enjoy some lovely early morning strolls as soon as he's able
With feeding, all I can say is Bailey doesn't eat all of his RC in one go, and tends to eat a bit, then come back to it when he's hungry.
Try and enjoy your early mornings (easier said than done, I know) but they grow up so quickly