Hello, it's normal to feel a little overwhelmed at the beginning. Are you a beginner in learning the Chinese language? The idea is that you could build your own folders and vocabulary lists. Each list may contain entries (words, phrases, and sentences) that you wish to train. You can search and find existing entries in our dictionary or request your own to be reviewed and added by the trainchinese team. Give it a try and let me know if you have more Qs. Thank you!