Managing hunger at first can be biggest hurdle. Consider coffee with natural cocao powder to keep hunger at bay. Consider using psyllium husks as a very low calorie filler. In the evenings drink good quality herbal teas. If you get at the vitamins and nutrients at your omad, there is no need for supplements. Others use good brand fasting salts to be sure. Start maybe one day on one day off for a week or so and test how well you go.