Just eat and track

It's trial and error for me. I eat whatever I want but obviously if I want to feel full longer and fuel my body and feel good, i eat good foods.
As far as fruits and veggies, you can aim for the 5 a day rule if you're getting none now that will probably be enough of a challenge for now.
I'll PM you a link to my livestrong diary so you can see what I eat.