Don't worry about that, perhaps ever, but at least not now. Just do something you want, perhaps fix a bug or whatever. And write about it. Get in the habit -- it will make you feel better.

Then you will discover that there are other people who are also interested in X. Also you'll discover that what you consider obvious info isn't obvious to others -- and they are smart people too.

I used to be shocked by some posts that made the front page: "that's just trivial stuff everybody knows". That was pure snobbery on my part: I only knew that stuff because I'd been exposed to it decades ago (and there's of course tons I don't know, and never will). And the posts that made it to the front page were good explanations -- and many started with "I didn't know this at all so I looked into it and this is what I learned"

You'll be amazed what support and interest you get from simply showing up.

And don't bother to try to have a readership in the instagram-influencer zone. Better to have a group of people who are interested because they are interested in things you also are.

Do things for yourself. Find things missing and improve upon them. Don't think about the "product", but think what you want.

Unless you're not talking about the self-improvement path outlined in the post, but rather a startup. In that case things get a little more difficult.

It's eye opening once you realize that most interesting ideas are simply iterations or slight improvements on existing ones. Simply releasing a similar product with one additional feature, or at a cheaper price point can excite the right people. In my experience most ideation comes from building a product. Spend enough time in a product space or market and you will naturally come across "interesting" ideas. I put interesting in quotes, because when you are in that space, the idea of iterating on a product may seem obvious or mundane, but if you can execute, and convince the customer, it's anything but.