After my first issue was resolved where the "Publish" option didn't exist (I had to delete the .git folder in the project root directory), I am now able to publish but I get a strange error after filling everything out. I have two-factor authentication enabled in github, so I generated a token and used that as the password when I was prompted. I have the correct URL and the Module Name and Message fields are filled out, but I get this error when I hit OK:
Version control operation failed: . Entry not found by path: packages/Xamarin.Forms.18.104.22.16823/lib/portable-win+net45+wp80+MonoAndroid10+MonoTouch10+Xamarin.iOS10/Xamarin.Forms.Core.dll
This message is in bold with the exact same message right underneath it in normal font. I can't seem to understand why the publish isn't working, any ideas?