I agree with keto. If you find the information a lot then just try to simplify it down for the first week or two.
Plan a week of meals (repeat if you like) and focus on removing potato, bread, rice and pasta and anything sweet (yes including nearly all fruit) from your diet.
Meals should be focused around protein, dairy, eggs and (mostly)green veggies. Drink only water, tea and coffee with no sugar an minimal milk.
Ensure you add fat. Butter, cream, you can add oil, spices, garlic, chilli, mayo and herbs to anything.
Meal ideas
Breakfast
Scrambled eggs with butter
Bacon and eggs (no sauces
Fried Mushrooms
Cheese omelette
Natural yogurt, with nuts or raspberries/strawberries
Lunch
Chicken soup
Mushroom soup
Broccoli and stilton soup
Salad with meat/eggs/cheese
Dinner.
Meatballs in tomato sauce with cheese with fried broccoli
Fajita chicken (without the wraps) so with cheese, sour cream, fried peppers, leaves.
Sausages with coleslaw (mayo and vinegar)
Chicken with bacon and Creamy garlic sauce with courgette.
There are tonnes of recipes on the low carb bootcamp here on Mumsnet if you want more creative ideas.
You will feel like you are coming down with something. Shaky, cold, headache. This is sugar withdrawal. Keto flu. The first week is the hardest but you will find that at about 10-14 days your sugar cravings and appetite will reduce.