Change Social Icon in footer

Hello Support
I did a search in the forum and partly found the answer but not entirely….

I want to add a social Icon to the footer of a page that is not existing in your list of Social Icons (Twitch) by default.
Doing a search in the forum I already found how to change one of the existing Social Icons to use my own but the solution to also change the icons title attribute does not seam to work.
In the reply I found in the forum you suggested to add the following code to the functions.php file inside the child-folder

function change_flag_title(){
  ?>
  <script>
(function($){
  $(document).ready(function(){
$('.av-social-link-behance a').attr('title','Twitch')
});
})(jQuery);
</script>
<?php
}
add_action('wp_footer', 'change_flag_title');

But it does not work and “Behance” still shows as title on mouse over.
Any idea how to change the title to twitch?

Also, I would like to change the color of the circle that is set as background when hovering the changed Twitch Icon to the standard twitch color (purple) but I can not find where to change this.

Thanks in advanced for your help!
Gregor