You can set an alarm on your Android device through the built-in Clock app. There, you can also customize the alarm in several ways.
To set a Spotify song as your alarm on an Android device, you need to download both Spotify and Google's Clock app.
Google Home and other Google Assistant smart speakers (and smart displays) are pretty good for things like alarms, playing music and so forth. But how exactly do you set an alarm on your Google Home ...