Yeah! Yes you can....
Okay. Here's what you do. You find a picture on the internet, one that you own please. And then you get the URL of it. Including the http:// part.
You paste it into the post. And then you highlight it with your mouse and you click on the little icon, second row, second picture in, it looks like a little photo in a frame. That will automatically add your tags to make the picture show up when you post the post.

What a nice looking band.... aren't they???
www.deepwaterbluegrass.com