So if doctor says it's fine, I give my son one tablespoon of cereal with breastmilk/water/formula. It needs to be the consistency of applesauce and my sons pediatrician said anywhere between 3-6 months is a good time

we were told we can start her out slow since formula doesn't fill her

I've never started my kids on baby food til closer to 6 mos. Idk if babies are ready for food that young still..