Best bet would be to install ESXi which is free from VMWare and take it for a test drive.
Download the ISO, burn to CD and slap it in your spare box - it will delete everything and take over the drive.
Download the client software (a link is given after you install ESXi) and you set everything up from your normal machine - add some memory, how many cores, disk etc and then either upload an ISO to the machine and create your VM or stick the DVD in the drive.
Hope that gives you the quick once over!