Follow the video below to see how to set up a Kali Virtual Machine
Alternatively, read our guide
Download Virtual Box - This is the software needed to host the new operating system
Kali Linux Official Website - The virtual operating system that has the tools required
Alternatively, you could download Parrot OS which is an alternative operating system to Kali linked here. However it is likely the committee will be using Kali, so if you are new it may be easier to follow along using Kali.