this is a lot to unpack, but one thing I wanted to mention is that most people lose their sense of hunger for up to a year, so that is not unusual. Mine came back at five months out, and honestly, even though it was weird to get used to, I wish I'd been one of the small minority whose hunger never comes back. It was so much easier to stick to my plan and lose weight when I was never hungry and didn't give a flying flip about food. I actually found it pretty liberating after awhile.
you won't start feeling restriction until you're on solid food. Purees and fluids go through your stomach pretty fast. As far as hunger and fullness signals, again, if you're like most of us, you're going to lose your sense of hunger for a few months - up to a year. And when those signals return, they might be different than before. I don't feel "full" the way I did pre-surgery. It's hard to describe, but when I start feeling pressure in my chest, I know it's time to stop eating or I'm going to be sorry. Some people have even weirder signals, like sneezing or a runny nose.