"Focus on the Locus." Is something I tell myself in order to orient and write from a place of personal understanding. A frequently given piece of writing advice, which I'm sure you've heard, is, "Write what you know." It's great advice and practical as well, however, if you're still finding it hard to know what to write or think that you don't 'know' anything, then another helpful reminder is to "Focus on the Locus", which means, "Focus on where you are", or, in other words, "Write from where you are."
You don't have to be the greatest writer immediately, and you're already on the right track with your conclusion, just keep writing and you'll figure it out. Good writing will eventually come from the habit because you're developing the skill. And 'where you are now' might not be the same skill level as those who you read (which can be paralyzing), but it's your locus (or source), so it has power :)