This is a common misconception about keto. There shouldn’t need to be any math at all, and none of the foods are weird - eat meat and vegetables. Period. Nothing weird about that.
The math thing, needing to hit macro percentages, is a common misconception perpetuated by a lot of those advice sites. The percentage advice was developed so that the same advice could be given to everyone, with the result being that it is right for everyone, but also wrong for everyone.
The fact is, you don’t need to hit any percentages. You don’t need to “up your fat.” That’s the most important thing I can tell you. You need two numbers only - your daily carb limit (go by total carbs, not net carbs, or you’ll end up screwing yourself up), and your protein goal. That’s it. Then eat as much fat as you want or DON’T want to satiety. You don’t produce more ketones if you eat more fat, or lose more weight if you get up to 80% fat. Your fat % will change over the course of the diet anyway, so just ignore it from the start. It doesn’t matter.
For me, I keep total carbs to 30g or less, and protein to 127g - I lift weights and have a lot of muscle already - then it doesn’t matter whether I get 70g or 100g of fat, I’m just eating it until I’m not hungry. It doesn’t matter if 30g of carbs is 5% or 10%, just stick to 30g. Really, really simple. I suggest starting with 30g carbs. There are a ton of good apps for your phone that have deep databases of food, just use the one you like best. I’ve used a few of them.
The only thing a little hard is figuring out how much protein you need. That’s a little bit of art, but once you know it, you don’t need to change it unless your body composition or exercise routine changes a lot. This article, by one of the most important keto researchers, has a good guide: How much protein should I eat on a ketogenic diet?
As for what food to eat, all non-starchy vegetables are fine. All real meats, poultry and fish are fine. Keep bacon and sausage to a minimum for treats, avoid deli meats altogether, but do choose richer cuts of meat as they will keep you satiated better (i.e. dark meat chicken instead of chicken breast). Eat some cheese, but not a ton. No fruit, at least to begin with. Cook with olive oil, butter, lard, tallow, ghee. Try to avoid industrial seed oils. Some nuts and seeds are fine.
My personal advice is don’t eat any fake foods - no “keto bread” or “keto brownies.” Those will only make you keep mentally craving bread and brownies. Cut them out entirely. I also choose to cut alcohol entirely, because a tiny glass isn’t fun for me.
Keep at it at least 6 weeks. That’s about the minimum for getting fully fat adapted. If you have keto flu - headaches etc. - add a pinch of salt to some water. Your body will be dumping retained water and salt along with it, so you sometimes need to increase your sodium intake until your body gets balanced.
I’ve done full keto every Jan - March for a few years now, and at various other times, and have done a ton of research. Happy to answer any specific questions via email or PM.
Good luck. It really does work.