Don't hesitate to ask (even simple) questions at #getting-started

IMO, after you understand the Java setup (InteliJ, Maven), :kotlin: is a piece of cake

You don't need Java as such, but you'll have to read Java to use 3rd-party libraries

Especially for Android you have a more limited ecosystem so the Java part is less important. You really need: Kotlin Gradle Android And stack overflow contains a fair amount of Kotlin content, and the Kotlin docs at kotlinlang.org are nicely done, along with having references to other resources and books.