The easiest way to become familiar with the power of the forum is to try everything. Move your mouse cursor all over the page - if a function is available it will become underlined or change colour. This means that you can click on the item and another page or facility will be shown. Playing with the forum in this way will help you learn the capabilities of the forum.
Remember - you cannot break anything, as all important functions are available only to the administrators; so, become a 9-year old and get playing!!!