If you want to speak carefully, you'd better learn to count calories. To lose weight, you should eat 300-500 calories less, and only lose fat without losing muscle. Without it, it will burn muscles. Weigh yourself every morning without eating or drinking. Write it down. A kilo a week means you are just burning fat, and more than a kilo means burning muscles. If you don't exercise during this period, eating less protein will accelerate the burning of muscles.
Generally speaking, if you don't eat, you will lose weight, and your muscles are most afraid of hunger. The more muscles you need, the more energy you need in a day, and the less you eat. The body will protect itself and adjust itself automatically, which will burn the muscles that consume a lot of energy and make you live longer. So eat as little as possible a day, the less the better, it will be uncomfortable, but this is the fastest way to reduce muscle and fat. Less muscle is easy to rebound, and burning muscle is a loss. So no one in a formal professional organization will advise you to do so.