actxserver move data in entire row few rows down

I am trying to use actxserver to format header row in an excel spreadsheet.

Before I manipulate header row, I would like to shift information in the second row (data row) down few rows to make additional spaces of rows between the header row and the data row.

I am having trouble doing seemingly simple task.

What I currently have is this:

function reformatHeader(excel_filename)
    % Connect to the Excel COM object and open excel_filename
    excel = actxserver('Excel.Application');
    excel_wb = excel.Workbooks.Open(excel_filename);
    sheet = excel_wb.ActiveSheet();
    % Get the size of the sheet; assumes rectangular and not ragged
    nColumns = sheet.Range('A1').End('xlToRight').Column;
    nRows = sheet.Range('A1').End('xlDown').Row;
    % Number of rows to add
    nRowsToAdd = 2;
    % I want to move the second row down by nRowsToAdd here

Basically the content of nRows should be moved to nRows+nRowsToAdd

There seems to be surprising little about of resources.. Is there a proper documentation with all commands?

I am using this at the moment, which isn't sufficient to do such simple operation: https://www.mathworks.com/help/matlab/matlab_external/using-a-matlab-application-as-an-automation-client.html

Thank you in advance.