I have the following program structure and I would like to know if this will work
Where will Start Date, and Opening and End Test be recorded ?
These are reading to me more like outcomes than Programs or Benefits. What is something that your constituents can specifically experience, join, receive, hold, etc. coming out of these programs? That's the Benefit(s).
There's a new Implementation Guide for Program Management that recently came out. I suggest you read through and follow its suggested structure. That should help you think through how to map the structure.
https://help.salesforce.com/s/articleView?id=sfdo.npc_implementation_migration_guides.htm&type=5