I have done IF 16/8; no problems. Currently doing OMAD but only started on Monday. Truth be told, I‘m fasting to morally support a friend with cancer who fasts the whole week around her chemotherapy.
I eat the same as before, a mix of homecooked meals with occasional „junk food“. I might keep OMAD going but shift the meal towards evening times maybe, currently I have lunch. But my dad cooks really delicious food in the evenings…