Keto works if you are honest

I ate just chicken and eggs and the first few days of diet change are suffering, but after that you get used to it and you feel much less of an urge to eat

Keto does not make you magically thin but eating keto suppresses apetite, and less apetite means less eating, and less eating is better

It will take weeks or months to truly see the effects but there is no other way than eating less, you do not have to excercise at all - I was a slacker and got thin

When you feel weak try eating vitamins and electrolytes, if that does not help do a cheating day and eat whatever except for pure trash like burgers, chips, candies and so on, one candy a day is fine but no more

Initially you will feel bad and tired and you will lose a few KGs but that is because water is bound to sugar in your body, and no carbs means no sugars, if you have no sugars then the body burns fat

Human fat tissue is about 8000kcal per KG. You do not have to go 1200kcal/day instantly. First get used to your new food, go past that initial painful gate, and then start counting callories. Do not do much cheating, 50 grams of carbs a day can break your keto state (I think).