To jam and learn Songs: Ohia - Didnt It Rain chords, your primary focus should be mastering these chords sequence: G, D, C, G, F, C, D, Am and C. I suggest starting at a calm pace of 38 BPM, and as you gain confidence, approach the song's BPM of 77. Considering your vocal pitch and chord choices, adjust the capo in accordance with the key: G Major.