You might need to be able to add code to your site to monetize your site.
You can use Google’s WordPress Plugin Site Kit instead to set up AdSense.
This is how you add snippets of code if you have WordPress.
From your WordPress panel go to Plugins.
Search Keyword Add Code
There are a lot to choices. AddFunc Head & Footer Code is a good one because it will allow you to put code in any area you might need it.
Just paste in whatever they give you.