I have never used fondant before and I would like to know what to do? I want to cover three different shaped cakes, a circle, a square, and a triangle. Is there any special way to do it? Like do you need icing, etc. I would like this cake to taste good too so do I put the fondant on top of the icing? I just need help! Haha.
You do need icing under the fondant -- it's kind of what the fondant adheres to and also gives those who don't care for fondant something to enjoy. There are some great videos on YouTube about how to apply fondant to a cake -- I strongly recommend checking them out! The only other thing to do is practice!
Youtube is a great place for cake decorating videos and it there are quite a few showing you how to cover cakes with fondant (including square and circle cakes). Here's just one:
Here's one by SatinIce (there are 3 separate tutorials):