Lost me at stage 3

So I believe I have everything set up, until I reach stage 3 (‘Add the tracking code’)

I’m trying to use Google Tag Manager, but despite you linking to this page (https://developers.google.com/analytics/devguides/collection/analyticsjs/enhanced-ecommerce#product-impression), I’m none the wiser as to how to add this code.

For example, to ‘Measure Product Click’, do I have to manually look in my product database, find the ID, name, category, brand, variant, list and position, one at a time, for each product, and then manually add this into the page for each product? Surely this is something the plugin does for me?

Am I missing something here?

https://wordpress.org/plugins/enhanced-e-commerce-for-woocommerce-store/