There are several other versions of linux that you could try in the event that ubuntu doesn't turn out to be your cup of tea. If you are going for the whole media editing thing, you might want to try ubuntustudio (http://ubuntustudio.org/).
Also you might want to try out SimplyMEPIS or Linux Mint as I have heard those are also pretty good for linux newbies. Currently I use ubuntu myself, but the first distribution that i tried (and actually liked more) was Fedora. Pretty much all of these distributions come with a liveCD that you can try out, but also if your machine is new (read: beefy) enough, you could go and get a free copy of VMware and install it under windows and then make a bunch of linux virtual machines to see which one you like best.
The whole idea behind linux and open source is freedom and choice, so if you don't like one version, by all means try another and find what works for you. Good luck man.