What Type Of Food Should Infants Start Eating, And At What Age?

You should start with baby rice cereal, it's bland.  Try it for a few days, this way you will know if your infant has any reaction to it. Apple sauce is good too! Cereal,.fruits, vegetables, starches and meats is the order I used with my sons.  For practice feeding themselves, cheerios are great or any small food like that. One thing I learned, not too many carrots - you'll end up with an orange baby!   As far as the age, use your instincts. Usually if they seem hungry after a bottle, that's a good time to start.  Try to feed them an hour before they go to bed, they will get use to eating "dinner: and not need a bottle at bedtime.
As for feeding them, use your instincts, ask you doctor or your mom or best friend! Listen to all the advice and go with what you feel!