For this worship set I’m using “Great Are You, Lord,” made popular by All Sons and Daughters. I’ll add to it the old hymn “Only Trust Him.” You can do this in A (the original key) or G (easiest to play on guitar). But I prefer to do it in F (best for congregational singing). I use the arrangement from lifewayworship.com.
The chorus of “Great Are You, Lord” ends on a 4 chord, or Bb in F. It seems to work best when you go straight to the F chord and sing the chorus of “Only Trust Him.” There is a change of meter (6/8 to 4/4), but you can “feel” that easily. I hope this works for you and your worshiping community.