When I first started I really didn't think anyone would read what I wrote. I actually started on another writing site, and wrote my first article a little over a year ago. I was so excited when it got a few visits from search engines, and I made like three cents. LOL! Then I wrote a few more articles that got about zero visits and made nothing, so I started to think it was a lot harder than it seemed.
So, I guess my greatest fear was that nobody would read what I wrote. That's still a fear. It amazes me now that hundreds of people from all across the world read my stuff every day. I never thought that would happen when I first started out.
As for how I "conquered" it, the only thing I can say is learn as much as you can, especially about grammar, style and clean SEO techniques. It's amazing how many people write here without seeming to know anything about keywords or even how to properly organize an article. Nobody starts out knowing that stuff, but it's worth it to take the time to learn. It makes this online writing thing a lot more fun. :-)