Hi @Alice Spaargaren ,
May I suggest you read through the official Microsoft documentations below:
Set up for live events in Microsoft Teams
https://learn.microsoft.com/en-us/microsoftteams/teams-live-events/set-up-for-teams-live-events
Plan for live events in Microsoft Teams
https://learn.microsoft.com/en-us/microsoftteams/teams-live-events/plan-for-teams-live-events
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Best regards,
Leon