I just started giving him rice cereal, just a bit at dinner time and then a bottle right after! I wouldn't use it for every meal or even a meal in itself but it's fine to give a little

Never. Cereal doesn't have much nutritional value. When your baby is 6 months old start with real food. Fruits, vegetables, etc

We started a little after five months because of his strong interest in food and being able to sit up unassisted. I would like to do baby led weaning at 6 months so we're taking it slow with introducing new foods