Hide Non-Video Participants
For your own benefit we also recommend that you change your setting to "Hide non-video participants." This will limit the number of tiles on the screen, and make the actors images larger and displayed together.
[If you don't have "Hide non video participants" set to "on" then what you will see tiles that display a name only. If you do, then you will only see people with their cameras on.]
If you are using a cell phone, this setting can be found by tapping on the three dot menu on the lower right as shown in the picture, and choosing as appropriate. ( If you don't see the dots, try tapping on the screen to make the icons appear.)