Add Comment Ability
Your blog now has some interesting posts. Your archive is now listed nice and clear. Your articles all have title on the top. It is now a blog that you can be proud of, so lets turn on the commenting ability for your articles. The people who are reading your page might have something nice, constructive, or funny to say.
Keep in mind in the beginning not many people will know your site, it takes time for a blog to grow. At the same time, i don't recommend showing your blog to anyone you actually know. For one thing, it would hinder your ability to write freely. Second, they might not like what you have to say. A good reference of what you might want to do with yoru blog can be found in Blogging Advice.
Blogger already has a nice step by step interface on how to turn on the comment feature. Seek and you shall find.