How creat team or class in Microsoft team

How to create a class or team in a Microsoft team. The Department of Education Gujarat State and Command and Control Center For Education, Gandhinagar has provided an online platform for virtual classes to the teachers and children of all the primary schools in the state. Information on how we can use it is given in the video.
You can click on this link to learn how to download Microsoft Team to your mobile earlier. https://youtu.be/nbzgRUUWC3w