Why are you trying to do omad and 36hr fasts?
If you can do the 18:6, stick to that, just stay under your TDEE. No reason to push yourself too far if it won’t work long term. This is a lifestyle, not a quickie diet
I had to take a week to train my appetite. I did this by skipping a late night snack (going to bed earlier helped this) and holding off on breakfast as long as I felt comfortable. Started at 12 hrs between eating, moved to 13,14,15,16.
I am not real far in but I’m now comfortable with a lateish dinner (7 or 8) and skipping breakfast. This usually lands between 16 and 18 hrs, but it’s occasionally 14 or 20 depending on my mood.
I am not in this to suffer or punish myself by feeling uncomfortably hungry. It took me a long time to get to this weight, and will likely take a long time to take it off.
Thats just me though
I usually have trouble starting after a bad period of emotional eating. It takes a few days, but what works for me is having all sorts of liquids available. Tea, coffee, diet soda, carbonated water. When I feel hungry, I just fill up on liquids. Also my last meal before starting a fast has to be a protein-packed one, otherwise I get hungry much faster
If you’re just starting I’d definitely do it in steps. Get your fasting time down first so you’re in a routine. If you’re doing 18:6 that’s fantastic. Don’t worry about calories etc. whilst you’re getting that routine down.
As you feel it gets easier you can then either tweak your fasting hours or what you’re consuming.
I tell myself: It’s a lifestyle not a diet. It will take time.