Every Android app you build starts in the same place: a working development setup. Before writing any real code, it helps to get comfortable with the tools, so that creating a project, running it, and seeing it on a screen feels routine.
Android Studio is the official IDE for Android development. It bundles the code editor, the Android SDK, the Gradle build system, and the emulator. In this module you'll install it, create your first project from a template, and run the result so you can see your app working.
Watch the lessons in order, then continue on to Kotlin Fundamentals.
Downloading and installing Android Studio on Windows, from the official installer to the first launch.
The same setup on a Mac: installing Android Studio and getting it ready for your first project.
An introduction to Jetpack Compose that walks through creating and building a simple first Android app.
A hands-on build of a simple to-do app in Android Studio with Kotlin, which puts the whole setup to use.