This arrangement is a great way to develop smooth left-hand chord transitions in the key of C, and at 120 BPM you have enough breathing room to really focus on clean changes.

Your biggest challenge here will be the sus chords — Fsus2 and Fsus4 require you to swap just one finger while holding the rest of the shape steady, so isolate those bars early and drill them hands-separate until the movement feels automatic.

Watch the shift from G7 to Am7 as well; that minor-seventh voicing can catch you off guard if you're not anticipating the finger repositioning.

I'd suggest starting at half tempo with just your left hand, looping the verse progression until it's effortless, then layering in the melody.

Use sustain pedal generously but lift cleanly on each chord change to avoid muddy overlap — this song's sad, reflective mood depends on that clarity.

Once the transitions feel natural, bring it up to full speed and focus on dynamics: keep everything gentle through the verses, then let the chorus open up slightly.

This is the piece that will build your confidence with seventh chords and suspensions in real musical context, and those shapes show up everywhere in pop ballads going forward.