To jam and learn the simple chords for Nihmune - Wish I Said chords, practice playing C, F, Am, G, Dm, Am, G and C in sequence. I suggest starting at a calm pace of 55 BPM, and as you gain confidence, approach the song's BPM of 110. With F Major as the song's key, tweak the capo to cater to your vocal pitch and chord likes.