To create a Kotlin Multiplatoform project, Use Kotlin Multiplatform Wizard.

Enter your project name to Project Name, App ID to Product ID. This is is used as applicationId for Android Build so set your reverse domain.

Check Android if you want to build for Android and Check iOS if you want to build for iOS.

Click DOWNLOAD button and get zip file including Kotlin Multiplatform project. Let's extract it to arbitorary folder.