How do I add the scheduled lessons to my Google Calendar?

To add the scheduled lessons to your Google Calendar:

Download the .ics file attached to the email notification that you receive.
Open your Google Calendar by going to https://calendar.google.com. Sign in with your Google account (if you are not already signed in).
Click on the gear icon (⚙) on the top right.
Click the Settings option from the menu.
On the Settings screen, click on Import & export on the menu options on the left-hand side.
Click on the Select file from your computer option.
Locate the .ics file that you downloaded in step 1 and select it.
Click on the Import button.
That's it! All the lessons will now be added to your Google Calendar!