Yes, auditions would be good, if possible, to find peoples' capacity and ranges.
We have recently started a 12-15 person choir in our small church, and for now am concentrating on simpler songs with no leads and older congregational songs, like GOD HAS SMILED ON ME and MAY THE LORD GOD BLESS YOU REAL GOOD. We have done NO GREATER LOVE (GMWA version), I CAME TO MAGNIFY THE LORD, without the leads. Am preparing to do OH, WHAT HE'S DONE FOR ME and I SHALL WEAR A CROWN the same way; hopefully people doing the leads will come later. Last rehearsal I introduced Kirk Franklin's Till We Meet Again as a closing song - they seemed to pick that up quickly.
We have a shortage of true Tenors and several in the 'monotone' section, so our performances aren't perfect, yet....have been teaching some parts, but mainly we are singing melody.
SOULED OUT might be good -