Milk to formula

FarmWife 🌾 • 2015 👧🏼 2017 👼🏼👼🏼 2018 👧🏼 🌈 2020 👶🏼
I'm no longer producing enough milk for my 8mo. I am using up my frozen supply and still feeding her off what I am producing too. Eventually, I know I'll need to use formula too. What should I start her on? We go to the pediatrician on the 7th. Thinking maybe she'd let her start on whole milk a couple months early ?? What have you done ?