Keep it happy and fun! When I first started with Roxy, I had my "obedience" mentality... first mistake. It's supposed to be happy and fun, I try not to really correct her, other then "ah ah" and showing her what I want her to do now.
Take your time with each obstacle. Let them really get to know them. Practice sending your dog to obstacles once they know them. I'm having a heck of time with Roxy now, she doesn't like to go on her own, I've got to run beside her. (this is one thing I think she's not too confident about yet) But hey, it's great exercise for me! LMAO
I'm just starting out myself, and I'm not very patient, it's my downfall. Just remember it's supposed to be fun for your dog. When they start looking confused, frusterated and not happy it's time to step back. Always be happy, tonnes of praise!
It's a lot of fun, I'm sure your girl will love it