Lessons from Bach's Time:
Seek God's will about the music program - ask Him what He wants done.
Study God's Word to make sure the music program is in line with what God tells us about music.
Have someone learn the rules of music - known, historical rules for stable music.
Teach music - the fundamentals
Teach music - music history
Value worship - the importance, precious heritage, and uniqueness of singing psalms, hymns, and spiritual songs as a congregation and in the home.
Grow in understanding - share the meaning of obscure words in the lyrics.
Provide useful resources - A church music library filled with all the needs for wedding music, Christmas music, funeral music, and choir arrangements; arrangements for all kinds of voice ensembles - young people, children, ladies' trios or quartets, men's quartets, mixed ensembles, etc. Resources for learning instruments could also be provided; music stands could be provided. If young people have an interest in learning an instrument, the church can help by providing encouragement in many ways. This requires discernment, because not all printed music is useful or good music, and some churches have bookshelves full of music that will never be used because of quality issues.
Enjoy the results - If the teaching and resources are effective, the musicians in the church will be able to play the music assigned to them, and the choir will be able to sight-read the notes of the music. Young men will be trained to lead singing. The choir director will be able to assign young men to song lead where needed, and the young men will confidently volunteer, because they've already been trained, have plenty of practice, and know what will be expected of them and how to do it.
Emphasize music in the homes: not just listening to music, but actually singing and playing instruments in the home; building godly musical resources into the homes. Hymn books can be collected; treasures can be sought out. Music can be written!
Within boundaries, lasting creativity will happen, surprising everyone!