I recently moved, and my now nearest store does not have self checkout. It's horrible. I spend more time waiting in the line than actually finding my items in the store.
During the three years i used my previous local store, I only had to wait for an unoccupied self checkout maybe two times.
In the beginning I struggled with getting the display to work, until I found this forum post https://community.home-assistant.io/t/using-ttgo-epaper-display-with-esphome/168877/27
Aside from that, I mostly used the ESPHome website that hendrik in the other comment mentioned.
It took a lot of trial and error, since I didn't know any YAML beforehand.
Thanks! I get the information from the Entur integration in HA, which gets data from several of the public transport services in Norway. The information is live, and there's even an attribute for current delay.
It's wild how the Samsung Galaxy Note was considered a large phone when you look at today's phone sizes.