Bad Snacks walks through the first step of building a chord progression in Ableton: creating a MIDI track and loading a virtual instrument. The process covers the keyboard shortcut for adding a MIDI track (Command Shift T), filtering Ableton's built-in instrument browser by category, and auditioning presets before dragging one onto the track.
The specific example uses Drift's Analog Chime patch, found by filtering the browser to the Mallets category. If your MIDI keyboard isn't triggering sound after loading an instrument, the fix is simple: check that the track is record-enabled, which Ableton usually handles automatically but occasionally requires a manual click.