how would you create an orientation plan for new staff?

Answer 1

Welcome them to the Company.
Introduce each new member by name and what dept they are assigned (or they can intro themselves)
Make sure they know the strength, products, goals of company.
Chain of Command up to CEO.
Overview of health benefits and retirement benefits, along with local discounts, if any.
Presentation on Sexual Harassment/ violence in the workplace.

There's a fun start - have at it
I usually get $$$ for that - but I retired