Sql Server - analyze sql script changes on a Database

Need your insights. Thank you for taking time and sharing. **Context** We have a 10 sql scripts which has more than 10000 lines of code and most of them are scripts and some code in each script are irrelevant **Problem** I need to identify which scripts and which parts of the script actually being applied on the DB so that we can re-structure the scripts . I at least need to share stats for my safety. I don't have any idea how to start - DML operations - DDL operations - Deadlocks I'm a junior DBA never had done this activity and I don't what compelled them to push it to me. May be I'm asking too much kindly at least push me in right direction so I can start somewhere.