Why should he bother about console, if the file is on desktop ?
Right click on the file and select properties:

Mark the file executable if it does not use extended permissions...

...or click "Advanced permissions" and turn on "Exec" flag for user:

After confirming changes You can just click (or double click) downloaded file to start installer.
Instructions are for KDE, but it should look similarily in Gnome or any other desktop environment.
Linux is
NOT harder to use than Windows.