STEP ONE:
It takes 24 hours, sometimes more, for YouTube to approve your channel for streaming, so you should request permission as soon as possible.
Go to YouTube and select "Create", upper right corner:
Then, from the drop down menu, choose "Go Live".
Then select "Create Channel" if you don't already have one.
Next, select again, "Go Live", upper right,
A pop up window will appear and you will be told you need to wait 24 hours... select "Request".
You'll need to verify your phone number, then a timer will appear, set to 24 hours.
I'll have Step Two here, tomorrow morning at the latest.