I didn't have much of an appetite post-op...I want to say it was probably around 2 months after that I felt like eating more. I did eat small amounts 6 times a day - high protein foods, too - and always had a snack next to me so I could nibble. Pretzels are good for snacking because you get the sodium, too.
Yes, I do sleep through the night, about 8 hours, without emptying and I eat dinner at 7pm.
Hang in there, it will get better:)