What Linux distro is good for a beginner?

In ascending order of how ambitious you wish to be:

Easy: Ubuntu, Mint, Zorin, Pinguy, Fuduntu, Mandriva, Solus

Moderate: Fedora, OpenSUSE, Debian, Puppy, CentOS, Bodhi

Advanced: Arch, Gentoo, Slackware

Of the two you mention, Ubuntu is the one which will require more "hands on" configuration, as Mint offers Flash, mp3, and DVD support out-of-the-box; Unity also has a less-traditional desktop than Mint in either the MATE or Cinnamon editions.

Ubuntu is easy, but Mint is like having Windows,

In a VM I'd try them both.

Linuxmint

debian is very easy.debian have many similarities to window. and ubuntu is good too but it's better to work with debian in first step and then migrate to ubuntu or other distributions like centos or....