It's good to hear from you today, cj2d. Allow me to help and share some information regarding setting up yourself as an employee for payroll in QuickBooks Online.
Since QuickBooks will recognize the used email, I'd suggest entering a different email address to complete the payroll setup.
You can get more details about setting up payroll in QuickBooks Online by going through this article: Get started with Payroll. You'll find additional information on how to set up tax information as well as steps in creating paychecks.
Additionally, for your payroll reference, check out this article: Payroll 101. It contains more information about the different types of compensation as well as on what are the types of federal forms you need to file. Also, this will provide you a sample breakdown of a paycheck.
I'm just a few clicks away if there's anything else you need or if you have any other QuickBooks concerns. Have a good one.