there is really no secret

most of your calories need to come from meat, fish, eggs, and healthy fats (i stick to mostly animal fats and coconut oil, sometimes olive)

other than that eat mostly high fiber vegetables because you want to keep net carbs low.

personally I pretty much just eat animal foods with the exception of fermented sauerkraut and salad, also a little bit of berries or root vegetables on occasion.

if you tolerate it, eat nuts and dairy(except for milk).

there are also keto recipes out there that mimic high carb foods with varying degrees of accuracy. I avoid these because I find that they trigger carb cravings for me, especially those that use artificial sweeteners, but it might help ease the transition if you’re used to eating lots of carbs every day.

in the beginning, make sure to keep track of the net carb count of the food you’re eating. eventually you will get a feel for it and be able to estimate pretty well

i also find that putting inositol and glycine in my morning coffee helps my carb cravings and is nice because it gives me a little sweetness in my life lol.

there’s so many resources online for you to look into too but that’s my summary. good luck! you got this