sushumna I think you don't use MoodleBox as intended. You don't have to connect any monitor and keyboard to the MoodleBox. Better: don't do it at all, it's not needed. You don't have to log into the MoodleBox either: this is only useful for advanced operation, as it is designed as a headless server.
You just have to switch on the MoodleBox, optionally connect it to your network with a cable, then, on your personal device (computer, tablet, smartphone, not on the MoodleBox), connect to the WiFi of the MoodleBox, then open the URL
moodlebox.home in your favorite browser.
Read carefully the knowledge base here: https://moodlebox.net/en/help/access-to-moodle/, where all of this is explained.