I just tell people I had a HUGE meal and can't eat anything right now. Even though I'm a bottomless dump truck food hole, most people aren't, and they will understand what it means to not be hungry.
As for the fat, I second the above advice. Once fat-adapted or free of the need/urge to rely on carbs quite so heavily, the macros you eat can vary quite a bit! Some folks like to cycle their ratios, others just shoot for keeping it stable. I tend to stay high-fat, about 65% daily caloric intake and often more, because everything just runs better (gut, mind, body temperature, etc.) when I do. But that's not true for everyone.
The ONE BIGGEST BREAKTHROUGH I've ever had since trying adjusting my macros is high-protein. I'm 5'9", hover around 175 pounds and 18% body fat, and a pound of meat is how I start my feeding time, pretty much every day, without fail. But them I also might have eggs, oysters, and other protein-dense foods. This feeds my lean mass and helps to prevent cravings, makes my bottomless pit a little less bottomless. And with protein so high, you will make some glucose
Steak, eggs, potatoes - fruits, nuts, berries and forage. Coconut milk and potent herbs and spices. Tea instead of coffee now and teeny amounts of kelp daily. Let's see how this does! Not really had dairy much, and gut seems better for it.