I read the first 3 chapters and worked through the in-chapter exercises (not the end-of-chapter exercises). I think that’s about 150-200 pages.
Yeah it’s quite a slog. I think I averaged 10-20 min per page of progress. I intend to return and finish it but it will take me ages.
It’s not a prerequisite at all though. Crafting Interpreters is pretty high level, in comparison.