Well it is VERY easy to do and you don't need a Google account.
At the end of every blog entry you see small blue letters that say " comments". Click on that and it will take you to a page like this.
Write what you have to say in the big "leave your comment box".
Unscramble the word for word verification. That's so I don't get computer generated spam.
If you don't have a Google account, go way down to the bottom of the page and click "anonymous". But be sure to sign your name in the box with your comment so that I know who you are. If I have your email I will respond to your comment. Then click the orange "Publish Your Comment" box. Try it! It's EASY!
I get so few comments that I wonder if anyone is reading my drivel. It's nice to know that I'm not just talking to myself.