How can I learn how to write a song using chords?

To learn how to write a song using chords, start by learning basic chord progressions and how they work together. Practice playing different chords on an instrument like a guitar or piano. Experiment with different chord combinations to create melodies and lyrics that fit with the music. Study songs by other artists to understand how they use chords in their music. Practice regularly and be patient with yourself as you develop your songwriting skills.