I'm: 1. Not an expert. 2. Not in the business of giving other people diet advice. But I can tell you what I do: something of a keto/Paleo+dairy hybrid. It's essentially extreme carb restriction, zero processed carbohydrates, zero processed sugars, zero seed oils. But where I'm not sticking to keto and more skewing towards Paleo is: I'm not obsessively counting carbs and while I roughly steer away from extremely starchy fruits and vegetables, if I want an apple, im gonna eat an apple, if I go for a run I'm not going to worry about blowing my carb budget on a banana, etc.

It basically boils down to: only buy whole foods, no grains, few legumes, very little packaging or "pre-preparation" aside from dairy (ie, I have to cook every meal I eat)

The other thing is.. while the evidence is looking pretty good in favor of the modern interpretation of cholesterol, it isn't a kill shot yet and that makes me slightly uncomfortable. so I'm playing both sides of the fence by eating low carb/high fat/high protein but not going insane on the protein sources: I try to get a lot of fatty fishes, more chicken, etc. I still eat a decent amount of beef, but I'm not doing the 100% beef/butter/bacon/eggs thing you'll sometimes see from extreme keto folks. They might be right that it's a completely healthy diet, but I feel safer being a bit more conservative while the science continues to shake out.

Some people might feel fine eating a stick of butter a day, but I'm not quite THAT convinced of the modern LDL interpretation to take it so far.