Next, you need to log into the website and go to the 'About the Team' area (info icon) for your team and click Edit (pencil icon). You can then invite someone else to be a Coach/Manager by typing in their email address. Once they have accepted and joined up, you will be able to go to the same spot to remove yourself as Coach or Manager. A team always needs at least one Coach/Manager, so until they are joined up the option to remove yourself is disabled.
If you just want to change your role, you can update that in the same 'About the Team' area!