It’s important not to overdo it in the early stages of the diet as doing so can cause adverse effects, like keto flu. (This is where your body may start to feel flu-like symptoms as you transition to using fat for fuel).
Cutting your daily calorie intake too low brings lots of risk and little reward. Yes, there are healthy ways to lose fat faster, but they are most effective once you have the basic healthy behaviors mastered first. "Yes, cutting calories leads to weight loss. Plenty of diets cut calories seriously low, at least at first, and they get results. But not forever." To be clear, you can be higher than the "healthy" range and still be healthy, or be lower than it and be unhealthy. Spending most of your life at higher levels can put you at risk for weight-related health problems such as Type 2 diabetes, certain types of cancer, and cardiovascular disease.