To start learning Amerie - 1 Thing chords, centre your learning around these elemetal chords sequence: Ebm, Gb, Ab, B, Gb, Ebm, Gb, Eb, B and Eb. I suggest starting at a calm pace of 49 BPM, and as you gain confidence, approach the song's BPM of 100. Align the capo with your vocal depth and chord choice, bearing in mind the song's original key: G Major.