As an exercise, write about an area of your expertise…. (and don’t “I’m no expert” me. Everyone has expertise in something; don’t be afraid of that word. The world uses it whether you rise up to it or not)…
Anyway, write about an area of your expertise, and write in such a way that you make the familiar unfamiliar, or the unfamiliar familiar.
Example: explain a harder-to-comprehend aspect of your field of focus and do so by comparing it to something universally familiar. Or, write about a very commonly understood aspect of your area of focus but explain an often misunderstood detail.
Go.
Once you finish, see what needs to be added to it to make it a publishable piece (likely only a timely intro and and a doable conclusion) and pitch that sucker.