my baby is 6 month ..wht kind of food should give him n how many times in a day

A. kind of food as ragi porridge wheat porridge rice porridge Dalia sabudana khichdi cerelac puree mashed boiled fruits and vegetables remember one new food one at a time give one spoon then after 3 to 4 days two spoon then after 3 to 4 days three in similar way once a day then twice a day then three times