As the above say, go for Ubuntu.
Just to note: Linux is not an operating system. Linux is a kernel.
The fundamental program that your operating system runs is called the kernel. It does the memory control, talking to peripherals, printers, your CPU, networking, stuff like that.
Linux is the kernel that was chosen, ~14 years ago, to run as the basis in the GNU system. As such, it's better to say GNU/Linux (since Linux could be replaced with something else like Hurd, but now for many reasons Linux is far, far more popular than any other kernel for the GNU system).
However, just remember the differences. Often you'll see on forums talk of Linux. Generally it's meant GNU/Linux, the actual operating system. But occasionally it'll mean the kernel itself (see kernel.org). Usually the context is very clear.