I'm not as far along in my journey as you but my doc requires to do a 6-week Optifast. I do know that when I do a low-carb diet in 2-3 days the hunger goes away, but I'm eating way more kcal than you.. I guess I don;t have any advice except Keep up the Great Attitude. You will have much success in what you've chosen if you stick to your happy, determined attitude! Good Luck!
ps - I sound like a fortune cookie in that last sentence...lol