1. The first step is to know the tune of 368 hymns. You can find the score or spectrum of 368 hymns, or find its recording for reference.
2. On the basis of understanding the tune, choose the chord for each note. Usually, the choice of chords will take into account the interval of each note in the tune and the harmonious relationship between notes. You can try to use some common chords, such as C, F, G and Am in C major, or G, C, D and Em in G major.
3. When choosing chords, you can also consider the emotional expression and rhythm of 368 hymns. Different chords can convey different emotions. For example, bright and happy chord sequences can convey feelings of joy and celebration, while soft and slow chord sequences are more suitable for expressing feelings of peace and worship.
Generally speaking, the choice of chords is a flexible process, which can be adjusted according to personal preference and musical style. If you are an instrument player, you can arrange chords according to your instrument skills and sound positioning. If you are not familiar with the choice of chords, you can also consult a music teacher or a professional musician, who will have more specific suggestions and guidance. I hope these tips can help you!