A ketogenic diet is not about limiting calories, but about eating in a way that works with the body, rather than against it. If you have always been trying to lose fat by cutting calories, then your body may be at the point where it really wants abundance, hence the hunger.
While lowering insulin by lowering carb intake is essential to freeing up excess fat to be metabolised, there are other things going on in the body, some of which can hinder fat loss. For instance, when we cut our food intake, the body cuts its metabolic expenditure to compensate. Short rations is the signal to the body that there is a famine going on, and it had better hunker down and conserve all possible resources, in order to get you through the hard times. By contrast, give your body an abundance of food, and it ramps up the metabolism, spending energy freely, and feeling free to draw on its store of extra energy—your stored fat.
These forums have many posts from people, especially women, who found that eating more, not less, was the key to starting their fat loss. You might give it a try. I suspect that, like me, you will at first eat a lot, but as your body begins to trust the abundance, your appetite may soon drop noticeably, as mine has done. Dr. Phinney advises eating only when hungry, stopping eating when no longer hungry, and not eating again until hungry again. In other words, don’t pay attention to the clock, just your body. If you find yourself snacking between meals, make sure it’s a low-carb snack, and then eat more at the next meal.