"So long as you write what you wish to write, that is all that matters; and whether it matters for ages or only for hours, nobody can say." So wrote Virginia Woolf in her book, A Room of One's Own. I agree with her advice. Almost all of the writing I have done was done for my own enjoyment. There was something I wanted to say, so I wrote it. There. Done.
But I must also admit that the idea of getting very well paid for what I write nibbles around the edges of my mind. And so, from time to time, I consider fame and fortune (preferably the latter) mere formalities to be enjoyed in my career. But, since neither of those things have happened (yet), I continue to write what I wish to write. And I am happy to do just that.
Good advice from Virginia, even though she ended her life by pulling on a winter coat, stuffing her pockets with stones, and striding into the River Ouse near her home in England. Her body was found three weeks later. I wish she had written about it instead of doing it.
So, dear reader, take to heart Virginia Woolf's advice. But not her example. Write what you wish to write. That is all that matters.