Just keep trying! Try giving foods that are easier to hold with his hands and fun textures. Stick shape is the easiest to help and get use to textures. My daughter's first favorites were tofu cut in strips and baked avocados fries (breaded avocado slices baked to give a little crispiness) its makes avocados easier told hold. Pinterest is amazing for the beginning eaters recipes. (If you have time of course I know life can get hectic) but dont stress over it.
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