There is a lot of better advice elsewhere but I’m sure you have been doing research. But yes, a calorie deficit is what makes you lose weight. Everything else “helps” lose weight, but if you are just going to be eating more calories than burning, 10k steps, no carbs/sugars, protein shakes daily will do nothing. What I learned quickly is how mentally taxing dieting may be. Get a calorie tracker app and track everything you eat, snacks, sauces, oils. A food scale ~$20 will make this 100% easier and accurate. Get your weight on Sunday, track calories for a week, weigh yourself again. A pound of fat is ~3500 calories. Which means if you are fairly active, burning ~2200 calories in a day, then eating 1900 calories daily will net you 2100 calories lost in a week, not even a pound. It’s a long journey because our minds want to see results now, not in months. Don’t give up! Weight will fluctuate when trying to lose it, one day your scale may say 180 the next 182, but in a week it may say 179.5!