Help narrowing down a focus/getting out of inaction

Hi Brooke,
For YEARS now I’ve wanted to start a blog and podcast or something of my own to put into the world. I allow myself to be paralyzed with the thought: “But I don’t know what my focus or topic should be.” That spinning means I don’t take action.

What are some steps I can take or questions I can ask myself so that I can find the niche to pursue and get out of this inaction state?

Thank you!