As an avid Goodreads user, Id say 80-90% of active GR users are female teenagers. Id suggest promoting on booktwitter or booktok instead if you want more traction. There’s also StoryGraph in the running with the same if not more features and a pretty strong network effect already, but still miles away from GR. GR is the laggiest platform I have ever used, and the tech updates are minimal at best, but people still use it primarily because of the network size. Just pure network size.