Cartographer is a simple and minimal vocabulary app, because vocabulary should be simple. (what an amazing excuse for being too lazy to add new features)
Anyways, to get started, you have to log on with the button on the top, and then just go and create your first list! press the + button on the right of my lists, then enter the name of what you want. Now click the list on the sidebar, and you will see two places where you can type text, make sure to type something in both of those places, and then it would appear as a card. (you can drag, rename, and delete them)
Try click on the quiz button (only works if you have more than one card) and start practicing!
Folders work similarly
Try clicking around some stuff and see what you can do!