I went ahead and moved this to a new thread and I will answer your question here.
The easiest way to start a new thread, that I know of, is to hit the Home button in the black menu above, then click on a category that is most appropriate from the list displayed, and when that category opens there is a green button at the top which says "new thread".
UPDATE: When the Bulletin Board software was updated the colors and layout changed a bit. Please see the updated answer below.