I figured it out thanks to:
Marian Heddesheimer YouTube video
https://youtu.be/S4Hz0NqPGDM
This was simple enough code, I just didn’t understand the WordPress Codex examples.
This is the code for social link icons:
<link id="themify-icon-font-css" media="all" type="text/css" href="https://wordpress.stackexchange.com/questions/218802/<?php echo get_stylesheet_directory_uri() ?>/font-awesome-4.5.0/css/font-awesome.min.css" rel="stylesheet">
This is the code for my logo:
<a href="https://wordpress.stackexchange.com/questions/218802/<?php echo home_url() ?>"><img src="<?php echo get_stylesheet_directory_uri() ?>/image/TSM-logo-BW.png" alt="logo"></a>
I knew my images folder and the css folder for my font icons were supposed to be within the child directory, but my head began to swirl with uncertainty because when placed in parent directory they only showed up in homepage. This video completely answered all my headaches! Thank You! 🙂