To be clear: I believe kotlin is a much better language to start with than java (but then, java is a pretty awful language inmho). But I've yet to see or read/hear about any books for teaching programming through kotlin as a ~first programming language (while there are many for python, ruby, java etc - or even lisp/scheme).
I would probably rate kotlin as a better starting language than javascript, for that matter.
Wow that's a big one then, I wasn't a Computer Science student but I like tech. Tried to learn Java a couple years ago and gave up, decided to go with HTML/CSS on Codeacademy as baby steps and did Javascript from there. If Kotlin is easier than that I'll definitely try to learn it ASAP I'm really interested.
I would probably rate kotlin as a better starting language than javascript, for that matter.