BookWyrm is a federated open social reading platform, and is the Fediverse's alternative to Amazon's GoodReads.
You can import your book data into BookWyrm from GoodReads, LibraryThing, StoryGraph, OpenLibrary and Calibre.
To import data, first export it from the other service as a CSV file, then log into your BookWyrm account, go to Settings > Import, select the type of data and then browse to the CSV file you had exported from the other service. Select the correct privacy setting, then click "import".
If it still doesn't work, try signing up on a different server. They're all run by different people, so some may be better maintained than others.
Just registered with BookWyrm and will stick to it. Bring the dark mode and mobile app and I'm all happy :)
The only flaw I see that Goodreads automatically matches the title with the "global" edition of the book and BookWyrm will import my books as translated, hence not matching them with the originals... Might be something to work on in the future though!
@email@example.com there are a lot of features still in progress, but we do have dark mode! You can select it from your user settings