This kind of music is popular in many of the churches in this area.

The song is good, and the recording is spot on as well.

Technical things..... I'd bump the vox a few dB and add some wetness through a slight bit of reverb. It will make the vox set better in the mix.
A few female background singers doing harmony would be the frosting on the cake as they say.

Loved that old timey piano playing on this too. What track did you use? It has a Floyd Cramer kind of feel to it which is PERFECT for this genre.

You can find my music at:
www.herbhartley.com
Add nothing that adds nothing to the music.
You can make excuses or you can make progress but not both.

The magic you are looking for is in the work you are avoiding.