Once account is created via Wizarr, wait until you see this page to start walkthrough:
Click here to go to the walkthrough page again.
On initial Plex startup, uncheck "Playlists", "Live TV", "Movies & Shows", "Rentals", and "Discover".
You only need "Watchlist", "Movies", "Animes", and "Shows".
You can also unpin them later on the Web App, iOS/Android App, or TV: