I thought one needed to be a PGA Pro and/or Run a Pro Shop on a course to do this...?

You do need to work for a Titleist Retailer. There is a lot of on-line training available to the staff of Titleist retailers. As I have said in the past, it makes a lot of sense for you to also be a PRA Professional or Apprentice. It is very difficult to properly fir clubs without a knowledge of the golf swing.

I just finished my courses for becoming a certified fitter.  How do you print out the certificate?  Also, how does it appear on your profile?

Log back in and at the end of the course, when you have passed, it will give you the option to print your certificate.