You can customize the clock face on your watch with complications, which are essentially icons displaying information from other apps and services. There are complications for showing the weather, your next upcoming calendar appointment, your Activity rings, heart rate, your email, and much more.
If seeing your next calendar appointment and having shortcut to your email are important to you, for example, browse Apple's watch face selection and find one that supports those complications.
To change your Watch face, press down on the Apple Watch's screen, and swipe to the left or right to select a different clock face. If you want to customize your watch face with complications, press and hold the Apple Watch's screen and tap the "Customize" button.
Then, swipe to the left to the last screen — designated by the dots near the top of the screen — to browse complications options for that watch face. Select a complication by tapping it on the Watch's screen, and rotate the digital crown to cycle through your choices. When you've found the one you want, press the digital crown to save your changes.