Joining an existing team as a new Scrum Master is like being dropped into the middle of a complex ecosystem with its own established patterns and invisible rules. You might be tempted to immediately start "fixing" things based on textbook Scrum implementations or previous experiences. Don't. Instead, invest time understanding the current landscape before making any changes. These teams have history, context, and reasons (good or otherwise) for how they operate. Your first job isn't to change - it's to comprehend.