How to create new activitys

Hi, at last i manage to make a total reset for my yellow unit and create a new user account. Now its time to learn how to use the softwhere.
I have started to manage a Zigbee wallconector and made a activity that turns
the unit on in sunset if the time is before 11 pm. Now I need to create a new activity that turns the unit off i the time is say 11:01 pm. But i can´t find how to create a new activity. Help me please.

The term HA use is automation and not activity.
It should be listed as a sub text in the menu.

The menue to the left in my softwhere dashboard says Activity.

Ahh, but that is a list of events that have occurred. Sort of a log.
Try the settings menu.

Settings → Automations & scenes → +Create Automation button (lower right).