Lesson 2: Chords first, then the song

Three steps, in this order

Step 1: learn the song's chords separately. Can you place each chord without thinking?

Step 2: practise just the chord progression, without singing. Set a metronome (free via an app) to 60 bpm and switch exactly on the beat.

Step 3: now play the song. Sing or listen along as you strum the chords. The tempo can stay low — being neatly on the beat matters more than speed.