Hi Susan,
Sorry that you are having problems. Do you have a ArcPRO license or are you using the free ArcGIS Online.? The free version may not provide you with the License options?
What device (computer type) are you using?
When you get in ArcGIS Online, click on your picture icon in the upper right hand corner, do you get these options?

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There is not a License tab. After you click on My setting a left hand panel should appear.
