If you want to self-host Lemmy you can just use this easy install script, just make sure to modify the config file to suite your setup it’s only a couple variables, and it’s pretty self-explanatory. https://github.com/ubergeek77/Lemmy-Easy-Deploy

The “official web app” is how people can self-host Lemmy, to access it as a user it’s just the website.

Stared at this for so long, everything’s looking pink now, lol