Day 1-3 if you get a headache drink some salt water. Just plan on drinking salt water to avoid the keto flu. A little goes along way. 

Track your macros. I find using an app to track your food you ingest gives you an idea of where you succeeded or failed. Without knowledge you cannot adjust. 

Once you get into ketosis, Intermittent fast. Let’s say eat solids between 12-8. I would still do morning keto drink as a starter which is really just some coffee, oil and heavy cream. 

Main issue I see with keto newcomers is they struggle to ingest fats and lean to too much on protein which turns to carbs so make those fats up in foods like Olives, Avocado, Fatty Nuts, Oils, Butter and etc. 

Do it long enough and you become fat adapted and multiple day fasts become a breeze. 

Best part of the diet is your body talks to you. Food like an avocado becomes a cup of coffee being the energy is sifted from fat and you aren’t bogged down by carbs. 

Anyways, just my 2 cents. Good luck!