setting up a new mac mini without a keyboard

You can't.

You need to dig out, barrow or buy a USB keyboard and mouse to get setup.

The Logitech MK 120 Combo can be found at BestBuy, Staples, OfficeDepot, Target or Walmart for under $20.

logitech mk120 combo

Can only be done with a keyboard & mouse. And for a first time setup, I strongly recommend a wired USB keyboard & mouse.

I don't believe it can be done.:(

I’d get a cheap USB KB & Mouse...

https://www.amazon.com/dp/B00B7GV802?

Windows Win key = Mac CMD key or ⌘ 

Windows alt key = Mac Option key or ⌥, also called alt key on Mac sometimes.

I'm having software problems in my MacBoo… - Apple Community