You've lost 11 lbs in ~5 weeks. At first it was mostly water, but by now it is probably mostly fat as your body rebalances hydration levels. And you'll lose less per week as you close in on your goal weight. Your plan to IF and stay in ketosis sounds good. I'm 25 years older and typically do 18 hrs fasting and eat 2 meals 6 hrs apart, which works great to reduce shopping trips during the pandemic.