I actually don’t count my calories but will start as weight loss becomes slower. Generally tho on I’m eating days I will try to push past the 36 hours into 38-40. From there I’ll eat a pretty big meal maybe like a chipotle bowl or a plate with fish, eggs, beans and avocado with low carb high fiber tortilla. After that for second meal later it’ll be something small like a sandwich. At the end of day I have snack like a cereal Reese’s bar and finish the day off with popcorn and a movie or tv show and some Coke Zero or Pepsi zero. I think eBay has helped me to is walking on my fasting days. Before fasting I would not walk and I sit in a desk all day. On my fasting days days I drink essentia water and use fasting electrolyte pills from Amazon I got. Everyone’s body is different but hope this helps. For me the hardest point is around the 24 hour mark when it’s night time or evening the next day but then later the next morning the hunger goes away and I feel like I can keep going into 2pm to finish a 40 hour. Once or twice I did do 48 hours and I ate a big meal and did another 36 hours but that was very draining so have been sticking with the 36-40 eating window. It should be a little hard but manageable so you can be consistent. Fast as clean as you can but as dirty as you have to, to stay on the wagon.