Auto Send Emails Based on Due Date

I am new to VBA but I have a spreadsheet that calculates when everyones qualifications are due. "A2" is there name, "D2" is due date and "G2" is their email address. I need to auto send an email when they are one month from their due date stating that it is coming due. If it could also copy that row with their info it would be even better. I have dug all over the internet but every time I copy and paste a code it always comes up with errors. Thank you for your help.