Hello there and welcome to LQ =)
If you are planning your first encounter with linux, and want to learn about it gradually, I would suggest a well supported distribution such as Mint, Ubuntu or Fedora. That way you start with a full featured desktop and can slowly explore it, while getting the feeling for it.
On the other hand, if you want to start exploring right away and see what you end up with, you can start with Arch or Gentoo.
If you want a graphic interface from the start, but a lot of tweaking to follow, I would suggest Slackware.