Since your post is more technical than a simple "Hello, world" post, I'm going to take the liberty of moving it to a forum where it will be more likely to get a response. I'm also going to change the title to more accurately reflect the content (again, to increase the probability of good answers).
You also seem quite comfortable with the ideas of forums, etc. Somehow I don't think you'll have much need of the "hand holding" that often goes with first posters in the new user forum.
Whether it is for a developer or DBA role, the questions will be the same as you would expect for a zOs role of similar kind.
As you are moving to a different role within the same company, I would suggest that you list down the work you'll be expected in the new role, and then focus on how/where it is different from the zOS role you are currently on ..
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