as far as I can tell, none really good ones exist yet...

the documentation is still scattered. The official website [1] is a good starting point. and I wish I'd seen this [2] earlier (I hope this gets incoporated into the official resources)

[1] https://ziglang.org/learn/

[2] https://www.lagerdata.com/articles/an-intro-to-zigs-integer-...

This is probably the most comprehensive resource: https://ziglang.org/documentation/master/