It is a good start. Flush it out to a couple hundred. Publish it on Amazon for 99 cents. I would buy it in a heartbeat.
How to market it. Just let it be known via all the sites comment sections. Both free and a public service.
One other thing. Ask commenters to provide their own examples. Give them create in your eBook.
Don't even have to wish you good luck…. this is a winner!