Depends on what you're hiring them for. Is it a paid or unpaid position? Is it full-time or part-time? Will they be doing a specific job or will they be learning many jobs?
My best internship ever was through a college program that connected with local businesses. It was paid, it was full-time, it was in the field I wanted to work in (IT), and they spent 2 weeks having me work in every department in the company to learn how everything worked...HR, production, management, IT, reception, the works. It was much easier to provide support after that because I knew who was in the departments & what their needs were.
Other than that though, I was pretty much on my own & discovered the two foundational rules of IT: git gud at googling for answers to problems, and be willing to tinker & not give up until things work. Persistence & google can take you far
