Hm..there's not really much you need to know on how to use the forums.
But you should know that there's different sections of the forums for different things and of course the rules of the forum that are here:
http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=16560.0More useful and official information on both the forum and game are here:
http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&board=38.0If you are wondering how people color their text just click the Change Color button at the top of what you are writing when posting something. There's also useful little buttons up there like making your text bold and the "insert image" button.
And if you want to quote someone on what they posted click the "Quote" button at the right top corner of the post or you can type "[ quote ] text here [ / quote ]"
Make sure to post it without the " and the spaces.
Oh, and floof is an action that users can do once they have posted a certain amount of times. They have to post 25 times I believe before they can floof someone, which just symbolizes a pat on the back of praise for doing something good, being nice, or helping someone out.
If you need more help just tell me. ^.^