Landen was closer to 6 mos before he could handle solids (other than plain soy-free oatmeal cereal) and hated the spoon anyway, but we also did bland, lighter colored foods first (pears, sweet potato, squash, applesauce that I made homemade from gala apples so they weren’t real acidic).
Carrots and banana as well as squash caused Landens reflux to flare but every baby is different! Green beans gave him bad stomach cramps (maybe beans= lots of protein…MFPI issues??) so it is all trial and error, so get ready and take your time doing 1 at a time.
Good luck!