Create an event in Google Calendar: Tap on the ‘+’ and create an event

Search in Google Calendar: Search for an event

Edit an event in Google Calendar: Edit an event

Add a new calendar account url to Google Calendar app: In a computer browser open Google Calendar and in ‘other calendars’ click on the ‘+’ and paste the url

Change Google Calendar Settings: Tap on three lines to see views and options and tap on the settings cog and make useful changes