What is the recommended approach to a first Kotlin project? Start writing Kotlin code in an Android project, or convert an existing Android project written in Java to Kotlin?

Do the Koans if you haven't already

What are the Koans?

http://kotlinlang.org/docs/tutorials/ the koans are also in the list on this page

thanks

I recommend doing them using the IntelliJ IDEA plugin, instructions are in that tutorial as well

what does Koans mean? is that a Kotlinism?

it’s a take on a term taken from Zen Buddhism: https://en.wikipedia.org/wiki/K%C5%8Dan

okay cool