As for sibling post, strong disagree WRT Douglas Adams. ducks. Unpopular opinion, I know, but your description of Vonnegut is curiously similar to how I might describe Adams. His supporters are enthusiastic and vocal. I wonder how large the group of silent dissenters is?
Cat's Cradle is a somewhat easier read. I'd suggest trying that next, and if you like that, give Slaughterhouse Five another try.
I never got why he was considered so great.
Give me Douglas Adams over Vonnegut any day. Adams is the real Satarist to the Galaxy.
I've always seen Vonnegut as using Satire as a veil for optimism. He makes the world so absurd and yet there is still room for optimism.
Adams always seemed to have a bit more British cynicism/reality to me. I enjoy him a lot too.