It gets tricky. Even oysters have carbs. But if you start doing a little mental tracking and estimating it soon becomes easy to eyeball how much carbohydrate in on your plate. And once you're at a healthy weight it's pretty hard to overeat carbs, even with a plateful of broccoli.
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.