Trying to Recreate Project

I found a project on Reddit from two years ago called "Love-Box" and it is for creating a simple system of being able to wirelessly send images to an E-Ink screen connected to a raspberry pi zero from a Firebase website/app(I think?). I am super new at coding stuff especially on the PI and the instructions given are not detailed enough for me to figure out what needs to go onto the PI and or what needs to be done for the app/website. I was hoping someone could look at the reddit link (which includes a GitHub link) and give me more detailed instructions? I really want to make something like this for my boyfriend. I thought about contacting the creator but he has not been active on reddit for about a year it seems. By more detailed instructions I mean that I do not know what needs to go onto the PI or ran on the PI from the three files. I know the LoveBoxUI is for Firebase, but the other two I am not 100% sure. I am basically looking for some dumb down step by step instructions or to the best of anyone's ability. I am using the same parts as listed except I am using a Pimoroni Inky Impression 5.7" screen instead. Any help is appreciated! https://www.reddit.com/r/raspberry_pi/comments/u2z4wb/lovebox_epaper_display_project_to_leave_my/ https://github.com/adrian-patterson/love-box