It will take a while to trust and adjust to your new appetite. I personally found when I was low fat and on Weight Watchers, I was ravenous all day long, so to be told eat what you like was difficult to understand. By eating more healthy fats especially, will keep you fuller for longer. And depending on how long you have been dieting for, and how insulin resistant you are, will depend on how long it takes for you to adjust appetite and weight. The odd person gains weight when they start because they don’t listen to their body. Remember to eat until 80% full (it takes a while for your stomach to register you have eaten your meal) and only eat when hungry. Don’t snack if you don’t have to. Are you really hungry or thirsty (similar feelings).
Take a break from breakfast: If you’re not hungry, feel free to skip breakfast and just have coffee (with some milk if you want it). Many people find that within a few days of eating low-carb, high-fat meals, cravings and hunger decrease significantly. This can make it easy to skip a meal, perhaps especially breakfast. Skipping a meal is cheap, fast, and might increase the diet’s effectiveness for weight loss and diabetes. See intermittent fasting
You mentioned ketone strips. If they are the urine strips they are useful to see if you are in ketosis, fat burning mode, but be aware they are not completely accurate but are a good guide to how you are doing. The blood strips are way too expensive but more accurate. I have a blood glucose monitor and went through a phase of testing to see how I react to dairy, protein, cream, coffee etc. I rarely do it now as I want this way of eating to be as simple as possible, but again, a useful tool starting out.
I personally don’t count anymore as I want this to be as easy and sustainable as possible. I have had years of counting calories and points, and this is incredibly liberating. I just don’t eat any sugars, grains or high carb foods any more so I am incredibly low carb all the time. When I was starting out I counted, just to see where my carbs were coming from and it was an eye opener. And yes you are correct, to go into ketosis anywhere between 20-50g carbs/day. Find out what works for you.
Lunch: pat dry chicken and cut into cubes. Lightly (!) salt and pepper. Heat a skillet over medium heat, once hot add coconut oil and fry chicken cubes until brown from all sides. Remove chicken, and add crushed garlic, curry paste and fish sauce to pan. Stir until fragrant and remaining oil in pan and curry paste are well combined. Then add coconut milk and whisk until well combined. Simmer and reduce sauce until desired consistency (1-3 minutes). Pour sauce over chicken and sprinkle with sesame seeds. Serve with baby spinach.