I had experimented with the carnivore diet a couple of years ago to shed ~10kg of lockdowns excess weight. It went very well, but I've gone a bit astray, the sugar, you know... but now I'm getting serious again. I'm in my third day now. These three filet steaks are going to be my brunch today, in a couple of hours.
The only non-carnivore addition is my ginger starter, a fermented ginger beverage. I have a tiny bit every morning on an empty stomach. Alternatively, I mix it with lemon juice for a few days before drinking it with sparkling water and ice, as a limonade. It's very easy to make and an excellent source of healthy gut bacteria. I wholeheartedly recommend you give it a try as well.