First generation Christians are different. They love Jesus but they don’t know anything about your denomination.
My wife once went to a retreat with a new believer who was not from a Christian background. Several songs into the worship (old-time hymns) this woman turned to my wife in tears and said, “When are they going to sing a song that I know?”
If you have people who are first generation Christians, they won’t fit well into a church filled mainly with 5th generation Christians. What kind of changes might you need to make? What kind of changes are you willing to make?