I’m not sure sure this is really a gathering or sending forth song even though it is in that section of Spirit & Song. Darrell Evans has written a song that might work for confirmations, but would be best as a solo vehicle. It has too many quick notes in the verses to be a comfortable fit for the assembly, perhaps they can sing the refrain. It really is more at home in a praise and worship service which is hardly surprising with its origin in Vineyard.
The text is at spiritandsong and it can be purchased for download at musicnotes or in a collection at OCP.
Darrell Evans does it slower than the speed noted in Spirit & Song.