SS is fine and I see why people like it, just personally couldn't immerse myself in the story with the main character being a different person whenever he's alone vs with people. Imo the author is way better at writing insanity.
Anyway back on topic, my advice for lotm is to just keep reading. The first tarot meeting is what ultimately got me hooked but if you're past that and still not hooked I'd say try to enjoy it from a different perspective. The first volume (200 or so chapters) is the slowest one and focused primarily around world building so it doesn't fit a lot of people expectations after hearing of later parts but it just needs to be read with a different perspective. The pace also picks up a lot volume 2 with volume 3 being a personal favorite. Trust me this first volume solidifies Kleins character and is the reason why the rest of the novel can be as good as it is and I personally cried from the ending.