DIY Watch Displaying new habit to practice every hour

Hello! I just got a Arduino nano 33 iot and adafruit SSD1306 OLED monochrome display.

Im building a wearable to help me reinforce new habits (e.g. speak from diaphragm, plan conversation intros, keep eye contact better, etc) as a way of applying new habits during the day.

How can i create a set of habits in which ONE is randomly selected and displayed on the OLED every hour?

thx and happy building!