My wife was raised in a religion that believed there were no "non-members, only future members." In other words, everyone was, whether they knew it or not.
I say this not to proselytize, but because it also applies to guitar in songs. Every song is a guitar song, whether it knows it or not.
If you can't pick out the chords, then a chord chart for the song can be a great starter. Then just start playing the chords where they belong until you find a strumming or picking rhythm that pleases YOU, the one being creative.
Repeat, refine, record.