Its a massive learning curve - your practically re learning how to eat post op and it does take a while to get it right, as PH said try using a small tea spoon and take smaller mouthfuls, in my view its better to eat a small amount of the fish than a load of the snak a jacks ! remember your pouch is the size of a golf ball so literally your belly is bigger than your mouth
As you learn what works and what doesn't you'll start to build up a list of what you can have and exactly how much, almost to the point that you can eat fairly normally again, i'm nine months post op this month and i can eat fairly normally, i can take full normal mouthfuls and i know exactly just how much i can get down and how to control my restriction to gain full benefit from the food i eat - trust me there's no easy way to learn this stuff, other than a lot of trial and error with a bit of chcuking up when you get things wrong !