Hi, Lauren D'Silva
I am very honored to be able to help you solve your troubles. To help other customers who may be facing the same issue, please choose ‘Yes’ underneath the post that had the solution for you. This highlights the information for other customers. Thanks for your cooperation.
Regarding how to delete a column, you can select the column, then right-click and select cut and the column will be deleted.
I hope the above information can help you. Feel free to submit a post if you need further assistance.
Best regards
Aiden - MSFT |Microsoft Community Support Specialist