Get familiar with KMM
Watch the introductory video, in which Kotlin Developer Advocate Ekaterina Petrova will explain what Kotlin Multiplatform Mobile is and how you can use it in your project. Together with Ekaterina you'll set up an environment and prepare for creating your first cross-platform mobile application with KMM.
Start KMM from scratch
Make an Android application work on iOS
If you already have a mobile application and want to make it cross-platform: