If you have permission to manage teams, there will be a menu on top called “Teams“. Select it and you will see a button “Create new team” which you need to click.
Fill out the name and owner email address (think of owner as a primary point of contact for that team), then click Save. Choose a name that is unique and descriptive. When inviting employees to this team, the invitation email that they receive will contain the team’s owner email address in the Reply-to field.