I found these two videos to be very useful for my training on Google Forms. The first one is how to send a customized auto-response confirmation email to the user after they have filled out a form; and the second one is to attach a PDF from Google drive on the auto-response email.
https://www.youtube.com/watch?v=GuFZ78_NZtQ#t=329 (Jeff Everhart, JE Media and Design)
https://www.youtube.com/watch?v=FzBQZAhjHeI#t=16 (Jeff Everhart, JE Media and Design)
