I bought a MacBook Air. I am trying to set it up and it is hung up and I cannot do anything.

I understand you're trying to set up your new Mac but it's just not cooperating.

Did you try restarting it? Press and hold its power button / Touch ID button until it shuts down. Then, start it again. Its initial setup should pick up where it left off.

If it still gets stuck in the same place it's a good excuse to contact Apple and have them talk you through it. It's free. Contact Support and click through all the options until it suggests calling them. If they're busy they can call you back at a time that's convenient for you.