If you want to start your own gospel music ministry, ask for guidance. As with any other issue in your life, whenever in doubt, pray to the Lord. God will grant you the wisdom to pursue this task if it his will. Through prayer and meditation, the steps you need to follow will become clear. Let go and let God.
Spreading the word and letting others know about your new calling will help you get started. Holding auditions for the music ministry will help you identify how many people are willing to contribute. People have individual talents, so divide the audition into categories: one for singers, another for the musicians and a third kind for people interested in administrative roles such as secretary, treasurer, director, recruiter and so forth. This is a collaboration to worship and praise the Lord, thus no one should be excluded from joining.
Preparation is the key to a successful gospel music ministry. Listen to a vast array of musical selections, to broaden your perspectives and acquire a sound of your own. You can alternate between instrumental music that focuses on creating the mood for worship and praise, or you can sing Christian songs focused on the word of God. By practicing regularly, the music ministry will strengthen and you will have an extensive repertoire of songs, and eventually you may even compose your own. Find ways to fund your new endeavors, such as sponsoring partners or fund-raising events.
As Martin Luther King, Jr. said, "Take the first step in faith. You don't have to see the whole staircase, just take the first step." Speak to your pastor or minister and let him know you have been called to serve God through music. Give free concerts. Play at every service. You'll see that as your faith grows, so will your community. The most important thing is to begin.