Did anyone give there 2-month old baby cereal?

my baby is just about 2 months old, and i was wondering if anyone gave there baby cereal at this age. my baby is still eating every two hours, so i heard it will keep the baby filled up, so she woe'nt eat as often and sleep longer at night. Does anyone have a suggestion on what kind of cereal is best and how did you give it to them? did you use milk or water and how much?