Linux has come a long way and is very user friendly now that even non-techie people can hit the ground running when using it. Similar to what the other comment mentioned, installing it is like 80% of the hard part. Just pick a distro that is recommended for beginners (i.e. Mint), and read up on a guide for creating a bootable usb installer. Distros like Mint make it very easy to install, you just need to know how to boot it from a usb drive.