There are two ways to post pictures, Taeylor - as attachments to a post, or inline. Check out "Posting - Additional Options - Attachments" and "Posting - Standard Posting Options - Bulletin Board Code" in the forum's Help section, which can be accessed via the "help" button in the main menu at the top op every forum page. Or check out the Testing board because there are loads of examples of how to post pictures there. For example:
Re: regarding pictures
Posting Attachments
(Though with attachments, things have changed a bit since that explanation. Members still need to scroll down below the text box, but now they also need to click on the "Additional Options..." link. The forum is no longer using YaBB SE. You may have noticed that at the bottom of every forum page it says "Powered by SMF 1.1.5 ".
)
But until you master things, here's a photo of Joanna that I've yet to post from her appearance on
Journeyman back in December '07:
(Check out this topic
Joanna Going Alert!
for one other one.)