I would start blogging about what you know (if you don't do so already). Focus on explaining how to do X. Then write about your opinions. It can be as short as a paragraph, or as long as a novel. In terms of writing intelligently the key is to learn about new things. If you desire to write intelligently about software, then by all means study software from the bottom up. As you study and learn new things try and explain them in your own words. How you understood it. The more you explain and the more you write the better your ability do so will.

I'm horrible with English. But that did not stop me from getting published in a recognized tech magazine. If I can do it, you can definitely can too.