Don't be afraid to feel hungry and have an empty stomach. Humans are supposed to (or at least, have been for most of our evolutionary history) eat, and then go decent intervals without food while the body burns what you had eaten prior. Only until recently/last 300 years or so did this idea of eating a huge breakfast, 3-4 meals per day, etc, come about, and what else has happened in the past few hundred years? Obesity skyrocketing and all sorts of health problems but that's a topic for a different day.
I only eat from noon to 6 or 7, i eat a lot during this time frame, but only during those hours. I eat a big lunch, then snack a bit, then eat a large "dinner", sleep, then go through the morning with just coffee. It'll take a few days or maybe a week to adjust and you'll feel very hungry in the morning but that's ok, that's normal, that's not your body saying "I'm starving" which is how most people interpret it and continue snacking all day, usually on garbage, it's your body saying "you usually feed me at this time, why not now?" but it'll go away.
If you wake up and eat a huge breakfast, then a couple hours later eat a donut, then lunch, then snack between lunch and dinner, then dinner, then something at night, your body is constantly busy just ingesting food and storing fat, you're never really burning anything, and people wonder why they can't lose weight. Even if you're not eating large portions, if the body is busy eating all day except while sleeping, you're not going to lose weight in your sleep...