Watchface - Interaction

Working on Dexcom Monitor app which is live (some good user feedback) still awaiting my Device. Now. Is there any way to use a button for an interaction? The idea is to disable an Alarm/Vibration/Sound.

Best case would be to press an button for 2 seconds, or touch interaction for 2 seconds to toggle/disable something.

All i found is interaction with gyro/accelerometer is this right?

Is there a way to jump into the app settings from the watchface? I read about long pressing the middle button?

still awaiting my watch, can't test this right now...