Congratulations 🍾 on your new Apple Watch Ultra 2! I am glad I helped you get started with your new watch. For workouts you need to scroll through the Workout app and find the Pool Swim, and Outdoor Run workouts. The app sorts them out intelligently based on how frequently you do a type of workout on the app. If it’s not listed there is an add button on the bottom.
Action Button, according to Apple’s guide on the Apple Watch Ultra and all about
watchOS 11, only
one app or shortcut/control may be assigned to the Action Button at a time. You can press it with the side button to switch it out but unfortunately the double press is a secondary action to the assigned entity. You cannot combine more than one action to the Action Button on Apple Watch Ultra and the iPhone 15 Pro/iPhone 16!