Drill teams are a lot of fun :)
I rode in one last year and am riding in one this year for my equestrian team. Seattle Washington, right? I'm afraig I don't know how old you are, but if you're still in high school I would suggest doing WAHSET (Washington High School Equestrian Team) and doing drill there at first. I'm currently doing OHSET and they're very similar. They wave working fours and Short Program drill, as well as all the toher english and western events.
Even if the school doesn't offer it you can co-op with another school.
And maybe just look around the area. Google is good, youtube too. A lot of the drill teams have websites where you can find them. However I can warn you it can be hard to find one and break into the world. The horse world is super political as it is, so you'll just have to keep perservering!
Pssh.I didn't pick up the wrong lead
It's called a counter canter...
...A very advanced maneuver.