Connecting a Counter plugin to the total Orders in Commerce API - Help please.

Site URL: https://destiny.contractors/test-index

Hi I'm relatively new to website building, I've done some basic CSS and HTML Code Injection on my site listed above, I made a test page to show the premade counter I have installed from Square Studio. I have some light background in javascript, I can understand the basics of various coding languages.

My goal here is to get this counter, for the Orders Completed number, to update live directly from the number of completed (or just total orders) that shows from the commerce API.

I have tried googling for probably multiple hours now in total, over the last few days, trying to find anything remotely relevant. I cannot find anything except for hundreds of commerce API plugin advertisements.

I rather like Squarespace and would like to make this work here. If anyone is familiar with pulling api information please help.

Thank you.