Asking what distro is best or what should I install is kind of like a stranger stopping you in the street, pointing to a used car lot and asking what car should I buy. My suggestion is take a few for a spin and decide what works for YOU.
The live linux cd is the best way for anyone to get there feet wet. They come in all sizes for easy download and the gui's are easy to understand if you want a browser, notepad, office package or mp3player, etc. If you can not get that far you need to decide if you really want to do it or not and formulate some questions
There is very little risk in useing the live cd, so once a person finds something that seems to interest them they can go about learning the details of the install process, or just keep useing the cd.
Since hardware can be an issue sometimes, if one does not work maby the next one does,you have not disrupted your current system or dirtied your test box and it will likely be used later so just hang on to it.
what to try as live cd is relative to the machine, personal needs and availability.
I say.. just do it
DistroWatch.com: Put the fun back into computing. Use Linux, BSD.
want a quick fix that's not windows..Damnsmall / feather
want a quickfix but kinda like windows....puppy
want last years buzz...ubuntu
want this years buzz..pclinuxos / mint
want hardcore NOW..install me...vector 5.9 std gold
want hardcore for that zippy new box..DEBIAN
How can I choose just one
My long winded humble opinion