Incorrect, while the symptoms of ADHD aren't unique to those who have it, it's more about severity and frequency.
Do not diagnose yourself based solely on memes, but it can't hurt to check if these relatable scenarios or feelings are nearly constant or negatively affect your life.
I would recommend audiobookshelf for the audiobooks, especially if you have your stuff running in docker. It seemed to me like the solutions to force Plex or jellyfin to do books were a bit more hacky than I wanted.