To learn Anvil - Mothra chords, your first step should be understanding these chords - D, E, Em, G, Em, D, B, C#, B, G and D in sequence. A strategic approach would be to train at 92 BPM initially, and then accelerate to the song's tempo of 184. Align the capo with your vocal depth and chord choice, bearing in mind the song's original key: E Minor.