You'll create a micro SD card with the appropriate operating system, following the same instructions as for the Raspberry Pi 3. Make sure that your Raspberry Pi Zero is unplugged and install the SD card into the slot. Then power on the device. After the device boots, you should get the following screen:
You are up and running!
Note
Note that if you use a powered USB hub, it might provide enough power to your Raspberry Pi. However, in some circumstances, it might not be able to provide all the power you need. I strongly suggest you use different power sources—one for your Raspberry Pi Zero and one for your hub.
You should be ready to bring up a Terminal window and start typing commands.