Need to add timestamp and user stamp to worksheet

Hello,

I am new to the VBA stuff and need to add a date stamp to A2, and a Name stamp to M2 and timestamp to N2 when something is entered into B2-L2.

To add a little complexity I am using a Excel Form to add the information to the worksheet.

Can anyone help? I have added the file for reference. The tab is "Data"

Thanks!!