In my experience, you only need to restrict carbohydrates, if you restrict them enough than protein doesn't matter.
Not to be rude, but you are completely wrong. Protein absolutely matters. If you consume too much excess protein above what your body needs for repair/recovery you can absolutely knock yourself out of ketosis (though generally not completely). I am going to stick to percentages, because defining things in 'grams' is pointless unless we are the same size, etc. , which I am willing to bet we are not. Anyhow, point being if you are at 50% P / 45% F / 5% C, you 'can' get into keto, but it will take you longer to keto adapt and you will most likely waver in and out of ketosis (when depending on timing, type, and personal metabolism). This is not ideal nor the right way to do keto (nor is eating unhealthy fats while in keto), not to mention the fact that this much protein intake is absolutely horrible for your overall health. If you have a meal or two here and there with your macros like that, it isn't a big deal especially after you keto adapt because you don't break the adaptation and you regulate quicker than say, having a cheat meal where you intake 80% carbs. People that do 'cheat' meals and say they are on the keto 'diet' make me shake my head in disgust.... it doesn't work that way lol.
You can stick to actual true keto, do it in a completely healthy way, and eat tasty meals. Once you get the ins and outs of what you can/cant eat and get some good recipes together, it is easy AND makes you feel great while keeping you thin and high energy. The only caveat being is that if you get too low of a body fat % on keto when you run out of dietary fats, you literally run out of energy like a car running out of gas. Fortunately an avocado, handful of almonds, etc and you are good to go in 15 minutes.
Anyhow, see my prior post on macros.