boat safety

How old do you have to be to get a boating license/ safety certificate?

I am 15 years old and I'm living I'm living in Virginia.

In Virginia... at age 15, Yes, you must take and pass a boating safety course approved by the National Association of State Boating Law Administrators (NASBLA) to operate a PWC, motorboat, or sailboat.
So, yes, you need to take and pass a boating safety course.
See link below for course, and more info:

Happy & Safe Boating,
John

Boat Safety and Starting Tips