Hi Jennifer,
Good day! I’m Jhakesong and I'll try to help you today.
If there is currently one user account in the computer, that cannot be removed. What you can do is create a local user account (administrator). Then remove your own user account.
Create a local user account:
https://support.microsoft.com/en-us/windows/cre....
Once that is done, then you can remove your account by going to:
Settings > Accounts > Family and other users > Select your account and click Remove.
Let me know how it goes. Have a great day!