Isaac Asimov once said that it is very important to be in the right place at the right time. That applies to any endeavor in life, including, as your article points out, the writing business.

That is why it is important to take another lesson from Asimov, and that is to do that for which you have some passion. Asimov was a very prolific writer of both fiction and non-fiction, and he said that he enjoyed writing just for the sake of writing. Even the mundane mechanics of writing: coming up with ideas, outlining, putting the paper in the typewriter, seeing the words take shape on the page, correcting typos, proofreading, editing, making necessary changes, etc., etc. --- everything that goes into the process of getting one's ideas onto the printed page. Asimov apparently loved the whole process. That passion, coupled with being in the right place at the right time, undoubtedly contributed greatly to his success as a writer.

Some folks criticize the do-what-you-love meme, calling it hopelessly impractical, and in many cases when it comes to making money it probably is in fact impractical. But the problem is that if you set your efforts to do what you don't really love --- doing it perhaps only for the money --- then when the going gets tough you tend to give up.

When it comes to creative endeavors, find the thing you will do as a labor of love for no monetary compensation, because there will almost surely be no such compensation when you begin, and there may never be much at all. Just do that thing to the best of your ability and see what happens. If that thing happens to be writing, then more power to you.

Until you start making money at you chosen creative expression, find some other way to meet your daily expenses (Asimov was a professor of biochemistry at Boston University). Artists of all sorts have always done that and probably always will.