My son is 5 month old I started him solid for exmple banana cerelac when he eat banana he did not take milk al day I am worrry I wish he gve solid and also take milk proper because he is under wait

Answer me this question my not feeding proper time he use solid then not give milk I am worry about him tell me how can I do because doctor said he is under wait he is in 5month but his wait 6and half kg

If he is refusing to eat properly he needs to be checked by the doctor