Hi,
No issues. We are here for the purpose to learn together so no shame in asking.
To make this change you need to do customization in report. Make a copy of this report and then do change in that.
About reports in Business central:
There are two parts of report in Business Central. One is dataset and other is Layout Design. Dataset is the data that is taken and from tables and/or is calculated using formulas in code. Dataset is designed in AL using VS code. Then comes Layout design. Two types of layouts are available inside Business Central. One is RDLC and other is Word Layout. Same dataset can be used to generate layouts in RDLC or Word. The report that you are using has RDLC layout. So to change that you need Report Designer as well.
If you are not a developer then its little difficult for you. Which version of Business Central are you using and if it is SaaS or On-Prem.