To start, you'll need to navigate to the Roku Channel Store on your device. This is where you'll find all the available apps, and trust me, there are some amazing ones to choose from! Just click on the "Streaming Channels" option on your home screen and you'll be taken to the store.
Once you're in the store, you can browse through the different categories or search for a specific app. When you find one you like, just click on it and select "Add Channel" to download it. It's that simple!