Chopin composed 24 Preludes in Op. 28 exploring 24 different keys (Major and minor) with each Prelude having its own mood and character.
In my step-by-step practicing of the E minor Prelude, I start with the Left Hand with its chordal mosaic, and listen attentively for descending chromatic movement between chords. In the foundational learning process, I want to be aware of common tones and those voice or voices within the sonorities that move. (Note that there are some progressions that are not chromatic)
I also need to use a supple wrist so I don’t enter the chords too fast, or with unnecessary impact. Listening across the chords helps to avoid a vertical rendering.
Next, I shape the right hand, which is especially challenging with its long notes in Largo tempo. The Alla breve indication of cut time, or a feeling in two helps move the melody along.
Finally, I play hands together trying to keep a nice balance between chords and melody, listening for how the passing, chromatic and other harmonies nourish the expressive line above.