this is my first time going this TSM. so noob not allowed here? seeking for proper training as well.
While I may give the impression that I am difficult with you, I'm trying to give you material that you can read so that you can understand what you need to do. I can feed you the exact commands all day long, but you would not learn anything.
While you wait for training, I highly recommend you read this RedBook, this will help you understand a lot of things:
Before you read it cover to cover, focus on these questions to help you understand what you need to figure out here. Start with sections 6.2, 6.5 and 6.6, they have to do with client option files, backups and archives, including retention. And additionally all of Chapter 9 which is about policy management, which talks about management classes, copy groups, destination and retention. Those are all topics you need to understand before you start changing retention and destinations as one small change can result on data loss.
Just skip those sections, they are absolete:
1.2 IBM Tivoli Storage Manager Express
3.3.3 Tivoli Storage Manager database .
12.2 ISC User and Group Management
Chapter 17. Reporting.