To add a photo you can click "Go Advanced" at the bottom, next to the button that you would normally use to post.
Then, when you get to the new page, scroll down and click the button "Manage Attachments." A smaller window will pop up.
You can then use one of the "Browse" buttons in that small window to access the picture file on your computer. After that, click the "Upload" button.
After it has loaded, you can click "Submit Reply" on your post.
Hope that helps! Can't wait to see a picture!