Baby Food

Do you have to give rice or oatmeal cereal when baby is 6 months or can you just do fruits and veggies everyday? I'm a FTM and pretty clueless to how much you need to give baby food after they turn 6 months. How much do you need to? I don't mean like how many tablespoons because I know every baby is different and eats less or more but how many times a day do you have to? At 6 months do you need to make sure and start feeding them plenty of baby food like 2 or 3 times a day so they can get enough nutrients and stuff? I breastfeed by the way if that makes any difference idk if it really does or not.