which food and liquid shall i give to 6 months old baby for weight gain and for body development. what to do so he shall start crawling

A. hi mom each baby has different milestones Once baby completes 6 months of age initiate with liquids like rice dal water gradually introduce other foods one at a time like ragi rawa pech fruit puree mashed potatoes Bananas sweet potatoes rice dal blends continue breastfeeding gradually give vegetables like carrots tomatoes palak doodhi , add in rice dal blends