I started the keto diet on the 9th of April at a whopping 180kg. I'm 6.6 and built like a block. But yes, I was fat, in the morbidly obese sense.
I say was because it is now just over 5 months later and I now weigh 129kg. I have gone from a 6xl shirt to a 2xl.
Best tip I can give anyone, eat...