If you are concerned about starting your day without a meal, what about making breakie your only meal of the day on IF days? Have a nice big awesome breakfast, and then go about your day.
I find I do better with dinner being my only meal of the day, or having a late lunch, late dinner on two meal days, but my hubby prefers to have a big breakfast and then nothing else on IF days.
My husband, who is a diabetic, has always done IF naturally. His mom used to harp at him about his unhealthy eating patterns, and I used to give him trouble for "skipping meals". Sigh... I feel SO bad now when I would urge him to eat because it was "so unhealthy" to eat once a day or not at all. LOL
The more I see the less I know for sure.