Here is one done in butter cream which shows you how to move your wrist when piping. At least this is another option for you if you prefer butter cream like I do. The below looks like she filled the piping bag up too much but never the less will show you the method of how. She is using the rose tip for doing this. If you want a bigger ruffle you can go up to the rose petal tip 125.
http://www.youtube.com/watch?v=jKdDNfPG2dg
Here is another one done a different way.
http://www.youtube.com/watch?v=l4_mNcsN5o8
If you prefer fondant I am sure you will be able to find many videos on youtube pertaining to fondant also.
Good Luck/ You can do it!!!
Edited by remnant3333 - 12/14/12 at 9:12am