@steve-walschot is exactly right here. You have one of two things to consider while on steemit. 1-Do you want to just have fun writing and see if you make anything. Or  2-do you want to so this to make serious money? That's a decision you have to make. If it's to make serious money which I'm assuming you do, then study on how to write a real good blog and spend some time writing a real article. Doesn't matter too much on what about, but I try and keep on eye on what's trending. For practice do an introduction or another if you already have, but spend 2-3 days to make it the best you can and see what your results are.