Bb advice as always is amazing
Just popping on with my thoughts and learning from my boys - one had severe acid reflux, the other has reflux and intolerances.
If you can bear it avoid grains. They are hard to break down. If you need to give a grain try something like quinoa over wheat. For us safe finger foods were things like homemade potato chips, pumpkin chunks, cooked carrot, legumes like chickpeas (though some babies may find these make them gassy T was fine), pear, apple and avocado are 'usually' well tolerated. Chunks of chicken or lamb to suck or chomp on. But if blw then watch your LO like a hawk!
Personally I think blw is really difficult with LOs that have sensitive systems and potential allergies/intolerances as it's often hard to know what causes the problem. You could try some purses, then use blw on the ones once you know they are safe. Ie pumpkin purée then chunks of it.