What do we need to get and do in order to start?

Best (tuned) piano you can afford either - acquire or rent

Adjustable Footstool and Adjustable Piano Bench

Suzuki Book One Recordings (as distinct from Spotify playlists) and Suzuki Piano Score(s) 

Listen: devise an easy reliable way (must be in the home, not only the car!) to play the Recordings “in the background” for your child

Prioritize personal time to learn Twinkle Variations, Honey Bee, Lightly Row, Cuckoo, ideally, up through Mary. Organize your time schedule for you/your child to enjoy the magic routine of daily practice together.