Starting your day by doing something that you dont really want to do (fast, exercise, meditate, etc); gives you a feeling of confidence that remains for 24 hours. But - your brain uses a lot of energy and will not work as well at the beginning of a fast (as your blood sugar is dropping) so you need to manage this. I find 2 meals a day - lunch and dinner works well for me.
I’ve done OMAD for over 3 years. Love it! Started eating lunch but mostly eating dinner. At this point this is normal eating. No desire to eat more often. I’d hate going back.
Try it and see how you feel mentally. Different people have different experiences. I personally didn’t see a big difference. Others do. But the health benefits (never get sick), weight loss/maintenance (which was big for me), never being hungry or craving food, feeling more energetic/active, …
I consider this hugely life enhancing. Recommend it highly.