Good evening, moms! Such a question, the baby is already over 6 months…

Good evening, moms! Such a question, the baby is already over 6 months old, I give puree and cereals, but the baby categorically does not drink water, throws it up + on breast milk. How do you feed complementary foods? It feels like he's not getting enough to eat, eats only 2-3 tablespoons per meal.