I successfully set up my own Magento 2 store and now I want to display all the categories on the home page. Everyone is talking about some "category page" but I can't seem to find it. Is this some kind of module? Where do I start? Also I found this: https://github.com/Sebwite/magento2-category-sidebar I followed the instructions but the sidebar isn't showing anywhere on my website.
I am stuck and I don't really know how to achieve any of this.