All I have for you today is a book recommendation. Even if you're primarily a fiction writer, you may have the opportunity to submit personal essays to anthologies or magazines from time to time. And you may want to blog about the world-changing events in your life. Those blog posts qualify as personal essays too.
And when you become famous, you'll definitely want to write and publish your memoirs, assuming there's no one left alive in your family to embarrass.
Naked, Drunk, and Writing: Shed Your Inhibitions and Craft a Compelling Memoir or Personal Essay by Adair Lara is a very good book. I can't remember who recommended it, but when I discovered it in the local library, I decided to check it out. It's educational, but it's also entertaining.
With her sense of humor and excerpts from other works, Adair treats the reader to a fine introduction to the art of baring your soul on the printed page.
Not that I'd ever do such a thing.