Teach and Learn
I used to work for the consultant company. One of their company philosophies was "Learn by teaching." They believe that knowledge also comes from teaching. So once we got training on some topics, we were also assigned to teach to new employees. I did not like it! I wanted to learn more before standing in front of people.
Naturally, I studied and researched a lot upon my preparation (I am a quite perfectionist). And how much I learned! Actually more than when I was just sitting in the classroom. I became an expert in some area.
As I start writing articles on my new website, which gives out a lot of information, I researched and learned a lot. It reminded me of my old company. You learn by teaching.
If you still feel you don't know enough to write the article, or even put out the website, remember, you don't just learn from listening and reading. Start teaching others what you just learned. You will become an expert!
Good luck everyone!