Hello Rita,
I stepped into my role with zero understanding of how to write a transform.
- Watch this video:
- Read this document:
Your First Transform | SailPoint Developer Community
- Create simple Transforms for your sandbox environment
I would take existing simple static transform and rework it. I would then look at first valid, these typically have multiple incoming values. Then try to add a concatenation to it. Working on building up nested and more complex APIs.
Good luck!