Okay if you want to dip your feet into Linux and see how you feel consider a live USB. It is a whole operating system on a flash drive. At this point you need a flash drive to install it anyway so you can play with it first and see how you like it. I would recommend Linux Mint. It is one of the most user friendly flavors out there. It comes with most of not all proprietary drives ready to go. Its goal is to make Linux the most user friendly experience. It can be installed with a few different desktop environments. If you are trying a light weight machine go for Xfce. Really at this point the difference between the user experience between mint and windows is almost zero. It is entirely possible that you could never open up a command line terminal.