Can you allow me to get some more description about Kotlin?

Question

Kotlin is a programming language developed by JetBrains for modern multiplatform applications. It is 100% interoperable with Java and Android.

Answer 1

Please refer to the tutorials Sololearn currently offers
https://www.sololearn.com/learn/7792/?ref=app

Answer 2

https://en.m.wikipedia.org/wiki/Kotlin_(programming_language)