It may seem like it's "too much", but it's what works for me right now. And having a clearly documented system will help me refine it over time.
I store all I write in Obsidian, including my articles, my own books, my courses, my YT scripts, the quotes I enjoy, etc. It's really the engine for my writing activity.
Beyond that, it's also where I plan and organize all my work, from yearly plans down to daily tasks.
And it's where I hold my journal, where all the inputs and output go.