Congrats on the weight loss but remember, if you can’t sustain what you are doing, you won’t stick with it. That said, those numbers are pretty large to me, especially the calorie setting which kind of sets the others if you do them as a % of calories.
When I started losing weight (starting at 356) via the bariatric clinic, she put me on LCHP and eating 6 times a day. For me that was 2200 calories, 85g carbs and 160g protein. Although I eventually relapsed back and got back to 356 again, it helped me when I tried again. That restart was back in March and it helped me get started again without feeling hungry all the time even if it wasn’t eating what I wanted.
It was during then that I learned about IF and then subsequently with how well IF and Keto work together from a mechanics standpoint.
I had done a 3 day water fast years ago when I was throwing a hissy fit (don’t ask LOL) so I knew that if I could do THAT, intermittent fasting would be easy and I jumped right into 20:4 and have been doing that since. Not everyone can do it that way though, anymore than people can start keto with a 115 hour fast like one person is doing…
If you are struggling with getting to 12 hours fasted, I would respectfully say that maybe IF isn’t for you at this point. Work with getting keto going and getting fat adapted and in that routine and THEN work to stretch it out into intermittent fasting if you like. I may be reading you wrong though. It looks like you mean pushing it to 12 o’clock but that doesn’t say how long you are fasting.
The hours that you fast also matter for many people. For me, my eating window is opened at 2pm and closes at 6pm and I am fasting the rest of the time. For some people, it would work much better for them to get up and have breakfast at 6am and then maybe a snack/lunch at 10am or so and then have your last meal around 2pm. For others who just don’t eat breakfast ever, not eating until around 11am-Noon having an afternoon snack and then dinner around 5-6pm with the family… Boom. Both have done 16:8 in a way that works for them.
I say to stop worrying about trying to do IF right now. Or simply change what pattern you are doing or shifting the hours. IF is simply a matter of changing WHEN you eat so make it work for you and don’t fight it even if it means relaxing it. Shifting times can help. Kind of like me and working overtime at work. I will do 6a-6p standing on my head, working 10 hour days 4a-2p are a pain and doing 12 hour shifts 2a-2p is a killer… even if it is the same number of hours as 6a-6p.