This video explains the two methods to join a Zoom meeting or course. The first is joining directly in a web browser and the second prefered method is by downloading the Zoom app and joining the meeting through the App.
The app works much better and gives you more control over the Zoom settings.
Zoom Download link: https://zoom.us/support/download
Zoom works really well with dual monitors if you are attending a course, as you can watch on one monitor and practice or take notes on the other.