I think that fasting IS as simple as not eating.
But we (and I am talking from first hand experience) tend to have a great deal of 'mental baggage' around not eating - and that makes it SEEM like fasting is huge and frightening and complex.
For me, I had Big Scary Buttons about hunger>low blood glucose>hypo>feeling ****>bingeing>feeling crapper>feeling guilty>feeling worthless>starving myself>hunger>and on, and on
Turns out NONE of that happens if I get into ketosis before fasting, and stay in ketosis while intermittently fasting.
On the other hand, if I try to fast after eating carbs, then the whole destructive cycle kicks in.
Just the way my body works, and easy to avoid, now I know how.
I also had/have a big Stress Point about going to bed hungry. Hate it. Fear it. Worry about it. This is due to a history of night time hypos and 2am bingeing standing with my head in the fridge.
Turns out this one is also easily avoided. Being in ketosis means the hypos are v unlikely. I usually fast 8pm to 7pm the next day, so rarely need anything before bed, and if I do, then it is easy enough to have a spoon of psyillium husks in water, or a fat bomb, or a LC drink.
And I have coffee and cream and fat bombs during a fast if necessary (call it a fat fast if you like), because I would rather do that, and keep avoiding carbs and protein, than break the fast through hunger.
So yes, the biggest barrier to fasting is our own mindset. But if you are already doing a form of intermittent fasting, then just stretch it a little, day by day, and see if that works. Fasting should work for you and your schedule.
Of course the one big thing to remember when starting fasting is that it may cause hypos if you are on blood glucose lowering meds. In that case, medical advice, or a stages reduction in meds, or just using common sense, is required.
