Ryobe has given you some wonderful advice. Yes, as she said, a dry saltine does indeed chew to a liquid and is easily swallowed. Actually, crispy things chew to a liquid well. Well-toasted bread actually chews to a liquid well. Of course crunchy things (salad, raw veggies), on the other hand aren't so good, so stay away from them). Be sure you eat all your vegetables overcooked, and stay away from gassy ones.
I do think she has a point as far as the relaxing when you eat. You may be over-thinking the whole thing.
This is what you do:
Take a small bite (I mean SMALL) of something--try Ryobe's suggestions. Then you just chew, and chew, and chew, until it basically disappears. It'll be a creamy liquid and ready to be swallowed. It'll give your chewing muscles a workout, but if you keep the bites very small, and chew, chew, chew, chew, chew, you can't go wrong.
If by chance you happen to choose a food that doesn't chew to a smooth consistency, deposit it in a handy paper napkin and try something else!
I could not eat even close to a cupful when I was at 20 days. I'd fill up with maybe 1/4 cup. As the swelling in my wrap/stomach subsided I became able to eat more. It's a very gradual process.
My surgeon told me I could eat ANYTHING that could be chewed to a liquid. He didn't even give me a list. He just expected me to experiment and try a variety of things and trusted that I'd use my good judgment. He was right. I did, and really didn't have any problem.
That said, when swallowing at your stage, it can be painful at times, as your esophagus and wrap are still healing. Cold drinks are also tough, as they can cause some spasming of the esophagus, which is uncomfortable.
Hang in there, Jean. it will work! Try to relax and trust that the food will go down. The pain doesn't mean it doesn't go through...it could just be a tired and healing wrap.