Yvonne, first of all, wellcome to the forum!
For various types of help with the forum, you can always check out the Site Feedback and Help "sub-forum" (as opposed to Main Banana Discussion). You can find it at
Site Help & Feedback - Bananas.org
I suggest you check out this discussion and follow the link Jarred post in post #3 as it covers what you're after (this link is how to post the images into your post within a thread):
How to post images in your threads
Good luck!
Harvey