Try this:
Pick 1 idea that’s in your head.
Write about it.
Limit yourself to 300 words if you want.
Publish it somewhere (blog, social, newsletter, whatever).
Don’t worry about niche, publishing “consistently,” how it fits into the big picture, or anything else.
The ONLY goal is to write and publish 300 words on one thing in your head.
If you do that, it’s a huge success.
The next day do it again.
And the day after that, do it again.
After a week, look at what you’ve done.
You’re publishing regularly!
You’re building momentum.
Once you’re up and running you can worry about optimizing and niche and all that other stuff.
You’ll figure that out as you go.
Your ONLY initial goal is to write/publish.