RSVP https://gdg.community.dev/events/details/google-gdg-nyc-presents-android-study-jam-add-a-button-to-an-app/

Unit 1: Kotlin basics

Take your first steps programming in Kotlin, add images and text to your Android apps, and learn how to use classes, objects, and conditionals to create an interactive app for your users.

https://developer.android.com/courses/pathways/android-basics-kotlin-three 

What you need:

Computer With Android Studio installed*

Meets these system requirements for installing Android Studio:

https://developer.android.com/studio#systemrequirements

Internet connection

(Optional) Android device & USB cable