/r/keto is a great community (and diet!) Go look at some of the success-story posts. I personally lost 11lb recently (in ~2 months) just by excluding carbs and setting a calorie limit. I found quitting sugar quite easy, as I felt so satiated from the fats and protein.

However, I fell off due to emotional reasons. Personally, I have to be in a 100% sound frame of mind to stick to it - there's just so many carbs everywhere, it's easy to fall off.