I'm a student and want to start a group, just as my fellow students have done as seen in the picture above, but I don't know how.
I'm a student and want to start a group, just as my fellow students have done as seen in the picture above, but I don't know how.
Hello, Josef Brown and 
The reason I prefaced my response with "in the same course" is that each instructor can customize settings within a course so as to allow or disallow students' ability to create groups. The blue section of the above-linked guide includes that caveat: "Note: If you cannot see the People tab in your course, or if you cannot see the Add Group button, your instructor has restricted this feature."
So if you're looking to create a group in a different course, and do not see the People tab in the left navigation or the Add Group button in the People tab, please contact the course instructor directly for additional guidance (How do I send a message to a user in a course in the Inbox as a student?)
Hello, Josef Brown and
Welcome to the Canvas Community! Assuming you want to start a group in the same course as the one in which your fellow students have already created groups, you would follow the instructions in How do I create a group as a student? to create a group of your own.
The reason I prefaced my response with "in the same course" is that each instructor can customize settings within a course so as to allow or disallow students' ability to create groups. The blue section of the above-linked guide includes that caveat: "Note: If you cannot see the People tab in your course, or if you cannot see the Add Group button, your instructor has restricted this feature."
So if you're looking to create a group in a different course, and do not see the People tab in the left navigation or the Add Group button in the People tab, please contact the course instructor directly for additional guidance (How do I send a message to a user in a course in the Inbox as a student?)