First, you'll need to have a newer Pixel phone. Anything from a Pixel 6 and newer should work. From there, it's simple. Just go to google.com/android/beta and opt-in, using the device on which you want to use the beta. Once you enroll, you'll get updates as a part of the beta. From there, you can test all the new features.

Android 16’s first public beta will start rolling out later today, bringing with it dynamic lockscreen notifications for ride-sharing and food delivery, following yesterday’s reveal of a similar feature in Samsung’s Galaxy S25 phones.

Google has launched the first Android 16 beta to developers and early adopters, providing insight into what the OS will bring later this year. A post on the official Android Developers Blog reveals multiple quality-of-life changes, such as ending screen orientation and resizability restrictions for apps "on large screens."