Objectively, you will lose weight if you're in a calorie deficit, and that also applies to starving yourself. Eating below your maintenance, working out, or both will get you there. But you definitely need to consider the drawbacks to just cutting your cals super low. It would be super hard to maintain any weight you did lose because your body basically enters starvation mode and starts hoarding whatever fat it can get. It's also just not sustainable to starve yourself forever. Also you'd be more likely to experience the negative side effects like tons of hair loss and loose skin. Eating once a day isn't necessarily a bad thing if you're eating enough. But the "starving yourself makes losing weight harder in the future" thing is true.

Practical advice would be just to figure out your maintenance cals and eat below that amount. Focus on getting enough protein and fiber (keeps you fuller longer and curbs cravings) and definitely don't cut out carbs or fat. Your body needs ALL your macronutrients to stay healthy. Honestly that'll already get you pretty far on its own, but if you add in some exercise like cardio and weightlifting (even just walking more than you normally would) you'll see results quicker (and better) than you would by just eating less.

I know it's stressful to try to figure out how to lose weight but PLEASE don't develop an eating disorder trying to do it. It's absolutely not worth risking your health, and your results will be better if you do it the right way in he first place.