Personal Development
Writing is self-help.

Matt Haig, Reasons To Stay Alive

“Look, unless you’re writing one, a self-help book is an oxymoron. You read a self-help book so someone who isn’t yourself can help you, that someone being the author. This is true of the whole self-help genre. It’s true of how-to books, for example. And it’s true of personal improvement books too.”
Article: Self-Help as Oxymoron