You've already received great advice, the only thing I can do is second the practicing of calling obstacles faster. That was my biggest weakness with Eli, I was far too slow with calling, so he'd veer off course because I wasn't giving him enough information. I've also had to learn to give consistent hand/arm cues. If I flap around he's unsure of where to go.
You guys will get it, she's going to be fast and wonderful!