Daily practice for the inner ear and the inner eye. Pick an exercise to begin. New exercises will be added to each family over time.
Recorded solfège voice: “Solfege” samples by digifishmusic on Freesound, licensed CC BY 4.0. Trimmed and level-matched for Betal.
The computer sings one solfège syllable at a time. Your only job is to see that key on the keyboard in your mind. Do stays on C, so do re mi fa so la ti do walk the white keys from C up to the next C. Add sharps and flats to bring in the black keys.
The picture is a crutch. Use it only until the keys appear on their own when you close your eyes. Fade out shows the keyboard at the start of a session and dissolves it over the first couple of minutes.