Confused Newbie

Hi all

I've been dabbling since July, and lost just over a stone, but - I am confused!  (not difficult!)

Obviously I'm doing something right as I am losing, albeit slower than some - however, I need to lose another 21lbs.  If I want to do this by Ketosis, should I be eating all that fat, or letting my body use what is already in there?

My macros (on CarbManager) are always pretty good, but I am losing (and gaining) the same 1lb over and over  Should I cut down on the fat

Thanks in advance