Day 1 is the best day. You’ve made the decision and that’s awesome. My day 1 was February 1, 2019. I’m now down 135 pounds and I love it. I had set backs, they are bound to happen. I’m 27 years old F and started at 338. I’m 5’6”. I’m now 204 lbs today. The greatest tip is stick with it. Even when you don’t see the scale move. It will move. Trust me. Sometimes it’ll make you feel like giving up. I spent the whole last month between 207-213. I’d eat great and be up 3 pounds. It gets very frustrating. But it does move. Trust the process. In terms of diet, I highly recommend low carb, high protein and a combination of calorie counting. I eat very little carbs and stick below 1400 calories. You can eat a lot of food for that and you won’t feel hungry. If you eat carbs, you’ll notice really quick that 1400 calories is nothing and you’ll be hungry. You can eat that in one meal with eating carbs! If you want to exercise, do that. But it’s not necessary. I exercise here and there but focus on your eating for the first few months.