As I was following along with the Classes, I couldn't locate my Tasks feature in one of my Calendars. So I wanted to post how I found it as my project.
In my case, my Calendar showed Reminders (top image) where Tasks were shown in the training. I hovered over the word Reminder (bottom image) and clicked on the drop-down arrow that was hidden until I hovered over it.
Then when I clicked on Switch To Tasks, it was then displayed where Reminders were.