“Untitled”-the work in progress that hasn’t gone anywhere

One thing you can do without really needing to know theory, and this might be a really complicated noob thing to do, cause I don't know my theory either, is this:
I could imagine a lead line over this, that kinda replaces the vocals. If you don't know your scales you could figure out which notes you used and where they lie all over the fretboard. I always use a google image to show all the notes when I am lazy. Then think about what lyrics would fit your mood of the song and try to put down the rhythm of how you may sing these lyrics down in a lead line, using notes from your chords at different places of the fretboard. Let me know if this helps!