Visit the Helix web site and read about the feature set of the free Helix forensics CD. Note that the documentation for Helix is not on the CD, to keep it down to ~700MB. Download a copy of the ISO image from links on the download page and burn it to a blank CDROM. Set your computer's BIOS boot order so the CDROM comes before the hard drive. Take Helix for a spin. Take screenshots along the way and include them in a write-up of your journey.