As a long-time anime and manga fan, I use my sites.google profile to keep track of everything I watch and read. I’m deep into shonen like One Piece and Jujutsu Kaisen, but I also love seinen gems. On my profile, I organize my watched lists, rate each arc, and even write short reviews. You can check out my sites.google profile to see my whole collection.
One thing though: Google Sites doesn’t let me embed videos easily, so I can’t show OP/EDs directly. Still, it’s great for cataloging manga chapters and sharing recommendations with friends. I update it weekly after new episodes drop.