I've been reading through and doing the guide as best I can but I'm a bit stuck at this point here - https://devdocs.magento.com/guides/v2.3/frontend-dev-guide/templates/template-sample.html
It seems as though the path to the minicart extension is completely different to the one posted in the link. For me its vendor/magento/module-checkout/view/frontend/web/template/minicart/content.html but the link suggests magento2/app/code which does not exist.
Regardless I've done the next part which is alter the content.html in a new file and paste it into a self created directory: app/design/frontend/Vendor/Theme-name/Magento-Checkout/web/template/minicart/content.html but unsurprising it didn't work. I'm using 2.3.1 Magento.
How do people usually go about altering the templates?