There's no hard rules here-- you can have only narration and no action or dialogue, if you want.
I would say to remember that the narrator is also a character (even if they don't exist in the story)-- if your narrator is like "Once upon a time, in a distant grove..." they should probably not also be "And Drpskn's head went flying! Hell yeah sister! Cut that philandrer's head off and kick it to the f***ing moon!" unless that is a dichotomy you keep up enough to feel in-character for the narrator, in which case it's perfectly fine.
Also: if you aren't sure how to use a writing technique, write a short story and play around with that technique in it-- it's easier to learn painting by painting than by theorizing about painting, generally.