Can't get Google Analytics Tracking Installed

I need to be walked through this. =) I have the Freelancer theme. I tried to go into Appearance--Editor, but I didn't see any way to select "header", "footer", or anything like it that people refer to when they discuss editing the code and placing the tracking code before the </head> tag. I scrolled through all of the code I could actually find and didn't even see a </head> tag. So I'm pretty much blind, I guess.

I have the Google Analytics by Yoast plug-in activated, and according to their install video, I shouldn't have to go into the code or do anything special. I followed their video exactly, and it connected for them and not for me. It seems all set-up on the WordPress dashboard, but the Google Analytics page insists "Tracking Not Installed".

I also tried a couple of different header footer insert plug-ins, and those didn't work either.

I am just so lost. Can someone please toss me a life preserver?? This is so frustrating.