Your blog gets to be whatever you want, but if you want one that is HN submission quality, one thing to consider given that you're just starting out is to have a (or a few) friends edit your writing before you post it. You'll notice that all of pg's essays have a "thanks to x,y,z" at the bottom.
Hmmm. Thanks... but why do I need someone to edit my stuff? I'm not scared of putting myself out there. Even with unfinished thoughts. I can handle the comments. How else is anybody going to learn and grow? What does HN submission quality mean? It says it right there in the news guidelines: "anything that gratifies one's intellectual curiosity". Sounds about right to me. HN is not the NYT. I'm just a hacker trying to figure stuff out.