My two were very different.
Typically reflux baby safe foods are things like fruit and veg. (Pear, apple, pumpkin, sweet potato, avocado, carrot) but they all respond differently. Some are fine on banana, others not so much. Avoid citrus for now, acidic food can aggravate reflux. Lots of reflux babies respond well to meat, though beef is harder to digest than chicken/lamb.
I'd steer clear on things that are harder to digest such as cereals. When you do start them try mixing with a tolerated vege or fruit and a little Breastmilk/formula.
I found with both boys the solids needed to be thicker consistency, if too runny it came back up.
HTH!