Hi Smsdavis,
You should edit your contoso name and user name in this link https://contoso-my.sharepoint.com/personal/username\_contoso\_onmicrosoft\_com/\_layouts/15/viewlsts.aspx?view=14.
But you don't have to do this, I will give you detailed steps to delete the lists.
- Sign in www.office.com
- Open OneDrive and click return to classic OneDrive in the lower left corner
- Click settings > site contents
4.Select the list you want to delete and click delete.
If you create the new list in SharePoint
1. Go to the list you want to delete, let's take Task as an example here.
- Click Settings and select List settings
- In the Settings page, select Delete this list
4.In the confirmation dialog, select OK
If you want to restore it, you can go to the Recycle bin.
If you have any problems, please feel free and post back. We will try our best to help you.
Regards,
Jason