Since it took me awhile to figure it out myself today, I thought I would explain how it is done for those of you who may be as computer illiterate as I am. Under the post there is a line that says 0 comments. Click on that and you should be able to post a comment. I think you can use any name you want to use and that you don't have to be a *follower* of the blog to comment.
I am taking this opportunity to also test out my ability to upload photos. Yay it worked!