Barney and friend...
To post a picture: Right click on the photo and find the line that says Properties. Highlight the line and click Cntrl and C together. Go to the posting box and type < img src, except leave the space out between the < and the img. Then, without any spaces, type " and press Cntrl and V together. This should paste the Properties phrase into the posting box. Close with another " and a > -- all without spaces. The only space in that whole phrase will be between the img and the src. Then click preview. If you've done it right you should see your picture. If not, you'll get a red X, or you'll get nothing.
Practice and you'll find that it is really easy and fun. Good luck.
Remember, your picture that you want to post must already be on the Web somewhere with a web address (properties) for this to work. You cannot do this with a photo right out of your camera.