To create your own Brawl Stars club is easy. The only requirement is that your account is at Experience Level 5 or higher. To start, press the Social button and select the "create club" option. Give your club a name, choose a badge and add a quick description.
Select between Open, Invite only or Closed to set whether players can freely join, require an invitation or make your club private. You can also set a minimum trophy number requirement for your club. This will not allow players trying to join your club below the number that is set.