Hi Sonya,
All of the things you listed are good choices for building a niche.
Consider branching out into one of these topics and which one would you most like to pursue, I have no doubt it will be a good choice.
With lessons and applying what you learn, you will begin to understand how it all works.
I can't wait for your next post.

Greetings,
Slavka 👋

Sure, those could all be directions that you head with your niche! Lots of different idesa there. :)