What are the rules of the atkins diet?

can you eat like bacon

& yes you can eat bacon. As long as its low to no carb, you can eat it. Eggs, bacon eggs, meats, cheeses, cream etc.

you caqn’t eat any fast food or sweets and you can’t eat any carbs or fat

You can eat only protein and up to 20 grams of carbs a day in the first two weeks. Those 20 carbs come from the daily salad veggies that you are allowed, not from sweets, flour/sugar or other carbohydrates. That is to kick start yor body into a state of ketosis which means that your body is burning its own extra fat as energy, instead of taking energy from the foods that you are eating. After those two weeks you can slowly start adding in more healthy carbs such as salad and veggies at intervals of about 5 carbs more a day for about a week. If youcontinue to lose weight on that level, you can add in another 5 carbs per day and keep that up until you get to a point where you are not losing any weight. Then back off a few. It works if you stick to it but it is not easy and takes some knowledge of the foods your are eating and their content.