Look at one of www.openbsd.org or www.netbsd.org or www.freebsd.org or www.opensolaris.org. At this time, for you, being a new comer to Unix/Linux, I suggest you use only Linux until you get used to it. Unices are a bit difficult to install and use and their user and support community is small and focussed. The above mentioned ones are some of freely available UNIX variants. Look at www.distrowatch.com for more such.
Use Ubuntu or Debian. I suggest you go for Debian. It does take a lot of work to install Debian as opposed to Ubuntu. But after installing, Ubuntu takes a lot of work to get it to your tastes while Debian takes almost no work to come to your tastes.
For Unix as well as Linux, this quote is true. "Unix is user friendly. It chooses its friends.". Both are operating systems. They are for doing things that you want done using your computer. Much the same as Windows. They differ by being a tad cleverer than Windows.
I suggest you go to www.debian.org and look at the installation manual. In short steps, this is what you have to do to install Debian successfully. Download Debian CD1. Delete a partition. Brun the CD1 to a CD. Boot your laptop with the CD1. Ask the installer to use the empty space that you created by deleting a partition from Windows. Answer a few network related questions such as domain name, DNS, IP address and such. Let it install the CD1 for a laptop configuration. Pop the CD out when the installation is over and reboot into the Linux system.
After you boot into the Linux system, open System>Administration>Synaptic and install xchat. With xchat, join #debian on irc.freenode.net to start asking questions and getting answers live.
Also join some of the many Debian user mailing lists.