Audacity is really worth getting to work. Ardour is more meant for multitrack recording and producing music, I don't think it's very suitable to edit (for instance) a wavefile. I haven't tried it for a while, but last time I did I found it very hard to do.. well anything in it.
Oh, by the way, it's cinelerra, not cinerella ;-).
On vl 5.9, the multimedia bonus disc was the perfect solution for trying out everything multimedia related. Unfortunately it might take some time before something similar becomese available for vl6.