Definitely books. I’ve read several: Programming Clojure, Clojure Programming and Brave Clojure. Also others but not for beginners (High performance Clojure, Mastering Clojure Macros, and maybe others).
Indeed I think the guides are not intended to teach Clojure, just give an idea of the capabilities and philosophy behind it. I can regret it because I’m currently learning Rust for fun and their docs are a wonderful way to learn. It’s litterally a book - that’s going to be printed soon. It’s roughly the equivalent of Brave Clojure, but even richer in content.
I’ve just checked, the official Learn Clojure page goes just into the basics.