To add your minting button on a Wordpress site you are going to need to install a plug in that. This is the one most of our users install to embed the mint button into their site:
"Code Embed" by David Artiss https://wordpress.org/plugins/simple-embed-code/#:~:text=Code%20Embed%20can%20be%20found,%2Dcontent%2Fplugins%2F%20directory.