>I feel like the keto diet sounds like a bad idea to me, is it actually a good diet?
No, I wouldn't say that it, or any other trendy diet is a good diet. It never did anything for me and from what I've seen, the keto "success stories" tend to consist of sedentary niggercattle who go from a high-fructose corn syrup and hotpockets diet in excess, to eating a bunch of meat and cheese in normal proportions.
The least-mentioned but biggest drawback to keto, and to any radical or esoteric diet, is the inherently anti-social nature of it. Have you ever seen those vegetarian jokes? Where some hipster douche goes to a barbeque or Christmas dinner and he's being a bitch because he can't eat anything? Or the cunt asking if her pizza is gluton-free? That's you now. Enjoy being white, around other whites, and not being able to eat grains, beer, root vegetables, or wine, or fucking anything besides fatty meat. Unless you're some kind of walrus-eating snow-abbo, none of your ancestors were "on keto" and yet, here you are today.
Resist the temptation to run to a fad diet as an easy way out to whatever health or fitness problem you may be facing. Which, by the way, you have neglected to mention. Why are you considering a keto diet in the first place?