Automatic add user in sudoers file

Like in many other newbie friendly distros I think that after the installation of Mageia the created user or users should be automatically added to the sudoers file.
Another little idea which I have: Can you replace vi with nano? Nano (in my opinion) is easier to use and have the same functions if not better.
Thanks for reading!
Another little idea which I have: Can you replace vi with nano? Nano (in my opinion) is easier to use and have the same functions if not better.
Thanks for reading!