If this video isn't working, it's also on YouTube. (NOTE: This video has no sound, just visuals).
Click on your "Apps" button to find "Google Meet" or just do a Google search for "Google Meet." Click the link to get started.
Your teacher may have sent you a link, if so, click that link. If your teacher sent you a "nickname" or code, click "Join or start a meeting" and type in the code.
If a box appears asking for permission to access the video camera and microphone, click "Allow."
Click the "Join now" button to enter the meeting.
Be sure to click the microphone button to mute yourself whenever you are not speaking.
Click the 3 dots and choose "Change layout" to select the layout you want ("Tiled" view shows everyone).