@Panpiper AMEN! You said it! AMEN!All it takes to meet your goal is to not quit.
I would restate though, if for no other reason to get your subconscious to continue to consider it, OMAD is a heck of a lot easier if you are also eating Keto. Not only that, but going Keto makes it all the more easy to drop weight. I dropped twelve pounds in the very first single week on Keto, from losing the water retention that is typical of a high carb diet. After that, dropping more is as simple as making your one meal a day, less in calories than your maintenance. Because your body is at that point metabolically primed to use fat for energy, it will automatically use your own fat reserves to make up the difference. The coolest thing though, is you'll hardly feel hunger at all throughout.
The downside is that your food choices are limited and eating out is even more limited. This can be mitigated to a very large degree apparently if you are a great cook. Very many things can be cooked that we typically think of as high carb, they just get cooked with creative Keto ingredients. It is apparently even possible to make sweet cinnamon rolls that are Keto!
I wish I could cook. I love cinnamon rolls.