If you don't have a medical need (diabetes, other type of problem with insulin) this diet is pointless.

Weight loss comes from one thing: eating fewer calories than you burn. Unless you want surgery, that's it. The keto diet works for some people because it creates a calorie deficit for them. That's all there is to it. Massive restrictions to the thing most people like most has that effect.

A better option for most people is simply tracking your food intake and your exercise. There are web sites and apps set up to make this as easy as possible.

Personally, I think any diet that won't let you eat fruits and berries is ... suspect.