J.K.
We had some of the same issues with my son. Anything too textured and he was gagging. We had ECI come out and evaluate. We tried offering different things. I think what it eventually came down to was time. We hit on things he liked to eat in the right shapes and ease of picking up. One day it seemed to just click. He started tolerating foods better and picking things up and feeding himself. I know it's a little frustrating not to have distinct steps to work on, but as I'm finally figuring out, these little ones usually do things on their own timeline and that's ok. It only took me four kids to come to that conclusion. :)