First of all, Rock Linux isn't new - in fact, next to Sorcerer, Rock is the oldest source-based distro. Second, to be honest with you I think that if you find Arch too difficult, you'll probably be lost with Rock. And unlike Arch, Rock does not have reasonably friendly forum and mailing list where you could turn for help.
I would encourage you to have another look at Arch, which is actually not that bad at all!.
But coming back to Rock, its real power lies in the concept that user downloads the Rock script, and uses it to build their own system from sources. This is a pretty advanced thing to do
But yes, it is possible to get a pre-buit set of isos, and it is reasonably easy to install a system from these. Be warned these pre-made isos are a little bit behind the latest and greatest, compared to some other distros.
I would suggest reading the Rock handbook you can find on their site - skimming through should give you a pretty good idea whether this is something you want to attempt at this stage.