Ladies help

Breast-feeding moms what do you guys do for the first year? Do you just feed your baby breastmilk and not introduced in the solid foods? The reason I’m asking is because my son used to love baby food stage one and two I’ve tried stage III and he doesn’t even take it. All he wants to do is eat off his tray by his self. When I give him something then he doesn’t want it. This baby cannot live off puffs. Am I doing something wrong? Can I just stick with formula until he gets over the stage if it happens? Thanks in advance