Once the event has been created, you can view the event in the "Events" page.
Go to "Events" page and browse for the event you want to start. You will see the event will have three options listed in the bottom: View, Edit and Remove.
Click on "View" button and the event's detail will display. In the bottom, you will see three options: Copy join link, Copy start link and Start meeting. To start the event, click on "Start meeting" option.
Once you click the "Start meeting" button, the browser will prompt you to open the Zoom app. Click on the option "Open Zoom.us" and the meeting will be started.