If you ask Cole Swindell what is the first song he ever wrote, he'll point to this song... "Country Boy Can."
He says it's the song that got him started. He wrote it with two of his good friends who had also just moved to Nashville.
Cole says, "That was the first one that people heard and kinda thought, 'hmm, this kid may have a future.'"
I'm not sure it's any place else except YouTube, as he wrote it at least 2 years before his breakthrough hit "Chillin' It" was released. The link above sounds like it might be a demo of the song.