Hey Brian,
Regretfully, this involves custom development so this is outside the scope of our theme support.
What I can do is lead you to the right direction. You need to update the if conditions in your code and use the is_single WordPress function like if ( is_single() && !(is_single(2)) ). 2 in the sample code is your post ID. In case you don’t know how to get the post ID, check out this article: https://theme.co/docs/how-to-locate-post-ids
Please just note that we will not support issues that will arise from the use of custom code nor will we provide enhancements. If you have issues with your custom code, you need to consult with your personal developer.
Hope that helps and thank you for understanding.