https://www.udemy.com/course/the-complete-kotlin-developer-course/

Build Your First Mobile App with Kotlin
Apply to jr. Android development jobs
Build real-world Android apps like Twitter,Facebook, My Notes, Find my phone, media-player, Calculator, find my age, find sunrise time and Alarm
Build online games, like Pokémon, play tic tac toe online with friends.
Work with New Firebase from Google and Web services (RESTful API calls)
Work with sqlite Database and SharedPreferences.
connect Android to PHP web services and MySQL database.
Work with user location and maps
Design amazing layout using Style, Color,Shape, Menu and ConstraintLayout
Work with camera and other hardwares, like light sensor to run music when light on and Accelerometer sensor
How to avoid reverse engineering (Reskin) for your app
Make app that support Supporting Different Screens, and different languages
Use system service like BroadcastReceive, Services, and Alarm
Understand the programming foundation
Understand the programming logic, condition and control
Understand the OOP in Kotlin
Use collections, And what is the better place to use collection