There are hundreds of Linux distributions with install media for usb/dvd install. Installing a distro like Fedora is as easy as setting up windows and has about the same UI quality.

Distros like Slackware or Gentoo give you more complicated setups but they are designed for experienced users.

There are so many places online to get help with a Linux install now. If you stick with the main distros as most do for there first taste of Linux its really simple.