Writers write because that's what they do. Paul Graham has been at for more than 20 years...there was a PhD dissertation and then two books on Lisp before all the essays. Joel Spolsky and Dave Weiner developed a following because they wrote something interesting...regularly without worrying about audience. What they focused on was writing.

There's no such thing as writing in your head. If it's not written its not writing. So start a journal for yourself. Start a blog. Write. Everyday. If it's reasonably good, a few people may care.

Good luck.