I need some help on this lol

Okay so this is kind of just for a future reference since my girl is only 4 months old. Okay so I'm formula feeding her, and when she gets to 6 months we will be starting her on solids but we have decided to not do the whole pablum and rice cereal thing, so we're going to be giving her puree foods, I think I read somewhere I still need to give her formula as well right? How much formula do I give her and how much puree foods do I give her when she reaches that point and how often? Or is there other things I should be feeding her? Can you tell om a first time mom? Haha. Anyways any help would be appreciated 😊