When you have an answer to a question in the Q&A section then consider whether it is a short answer of just a few lines and perhaps a link to another article then you can choose to give a comment response. If the question has prompted you to write a lot about the topic then why not create an Advice article from your response...
We have just launched, so you will find you only have one project blog, but thats a great start right? So click on "add a blog entry" and start typing. You can add pictures to enhance your project blog post.