ことりん習おうと思ったらAndroid Studioじゃなくて素のIntelliJ IDEAが必要らしくて泣いています。そこまでの興味は無いんだよぬ…
https://developer.android.com/codelabs/kotlin-bootcamp-introduction#4
Android DevelopersKotlin Bootcamp for Programmers 1: Get started | Android DevelopersIn this codelab, you learn some of the advantages of using Kotlin, and you install the necessary tools (JDK+IDE).