To jam and learn Houkago Teatime - 冬の日 chords, your primary focus should be mastering these chords sequence: A, D, E, A, F#m, E, D, C#m, E, C#m and F#m. A strategic approach would be to train at 75 BPM initially, and then accelerate to the song's tempo of 150. Adjust the capo based on your vocal range and chord preference, keeping the song's key of A Minor in mind.