I might be wrong but I thought it was 18 months for agility? No doubt you can still go and do light work with her though. I used to do flyball with my poodle x but had to stop because he started getting over excited and would bite me after retrieveing the ball!!!

He did do some agility but to Sidney life is all about the ball so unless I had a ball in my hand he didn't do any of the course!!!

Nut case that he is!!
I'm sure you'll have great fun, it's a lovely way of bonding and enjoying time with your dog...also you'll get some exercise too!!!