Why I wanna write, why I dunno how to and why I'm writing this

I started blogging over two years ago now. From the beginning, I saw it as a tool for sharing information (isn't that what the www is?). Well, what I didn't see it as was keeping a diary of my private&personal life. I suppose from very early on I would have liked to write about what I saw going on in the world through the filter of various media, traditional and alternative, as well as about my world(ly?) views. However, I have mainly stuck so far to quoting media sources and adding my little bit of (invariably cynical) analysis. I also realised early on, that the best or to be more specific the most visited and commented on blogs were those in which bloggers posted their views and analysis in the form of articles written by them and not by others. Still, I didn't feel up that standard. Do I now? Not sure. Part of the reason is certainly that I don't feel I have enough in-depth knowledge of the sort of things I would like to write about. Also, I don't have enough confidence in my writing ability. How do I write an article which is informative as well as humorous and militant? Still, it seems like the thing to do, and not merely to increase the traffic on my blog along with comments, but also because it seems like a more interesting and personal way to convey ideas which seem important to me. Maybe a good way to create debate too. So, I thought the best start was to spill out my wishes and my fears in a post, in the hope, obviously, that someone might give me tips, but also, that in the process a light bulb might appear above my head and and a Eureka! may form on my lips. How's that for a literary beginner?!