Add a Google Font to the Advanced Styling List

I have a Google font (Amarante) that I want to use as a font on my site. I have been working on this all day and finally just decided to ask for help. LOL

Here is where I started: http://kriesi.at/documentation/enfold/register-additional-google-fonts-for-theme-options/

As instructed, I tried adding that block of code to the end of functions.php.
add_filter( ‘avf_google_heading_font’, ‘avia_add_heading_font’);
function avia_add_heading_font($fonts)
{
$fonts[‘Amarante’] = ‘Amarante’;
return $fonts;
}

add_filter( ‘avf_google_content_font’, ‘avia_add_content_font’);
function avia_add_content_font($fonts)
{
$fonts[‘Amarante’] = ‘Amarante’;
return $fonts;
}

But, it didn’t have Amarante in the list of available fonts. So… some specific questions.

I found a bunch of similar threads on the support forum with variations of the code listed above, but after trying all of them, none of them showed the font in the font list in the advanced styling editor. Is what I am trying to do possible? I want it added to the list of available fonts via the editor, not just available via CSS.
Do I need to create a child theme for this to work? If I edit the main theme’s functions.php, will it be erased by future theme updates?

Feel free to talk to me like a child. I am not an expert in CSS nor web design, which is one of the reasons I went with this theme. :)