Functions Addition

I will preface that I am very new to much of this and have done quite a bit of searching.
Perhaps I’m just goofing something small up or a bunch of small things all at once.

I am attempting to add a function to the functions.php file for pushing data to a Discord embed. I’ve gotten things with IFTTT to work using webhook.site and I can see the data from the standard webhook output as well. I named the webhook itself discord-blog-announcement.

I feel like I’m close but so far away. Any suggestions?

function discord-blog-announcement($post){
	"content": "Message Here",
  	"embeds": [
    	{
      	"title": "$post['post_title']",
      	"description": "$post['post_excerpt']",
      	"url": "$post[post_permalink]",
      	"color": 5814783,
      	"timestamp": "$post['post_date']",
      	"image": {
        	"url": "$post['post_thumbnailurl']"
      		},
      	"thumbnail": {
        	"url": "$post['post_thumbnailurl']"
      		}
    	}
  	]
}
add_action( 'init', 'discord-blog-announcement')