Adding code to the body tag

Good day,
I have to add 2 sets of code to the before body tag for interactions, and code to the inside head tag (for music player). Thats a lot of code. Will anyone of them effect the others? I am new to webflow, and no nothing about coding (although I am starting to learn) but the tutorials that I am using to finish up this musicians website all add bits of code. I have one in already and it works great, but I am a bit intimidated to add the others.
Any advice would be greatly appreciated


Here is my site Read-Only: Webflow - Hippy X