Country Song Upside-down

I found a song
Upside-down
A country song, like a trout
Dying sky and water
Rainbow, flickering out

Inside a dark cabin
The more moonlike I become
I'm rounding all of my edges
'Cause I'm worried
It can't be sung

This is the gist
It goes like this

I found a song
Upside-down
A country song without a doubt
Dying sky and water
Rainbow, flickering out