Unrevoked 3 is your best bet. It's what I used. It was super easy, all I had to do was download it and let it run. It's great for someone who hasn't been on the mod scene since day one. If you have a Mac it's even easier, if you have a Windows PC, then you need to download the HBOOT files and install them. The below link has instructions for that as well.
public:unrevoked3 [RootWiki]