For direction, have her point her front knee where she wants to go (i.e. 20' up lake from the next buoy). On a gear note, a looser or softer rear binding, or a toe loop, can make the offside turn easier. Finally, have you done the work your way into the course method - start outside 1, shadow 2, 3, 4, 5, go around 6 and out the gate. When that's comfortable, turn around 2 and 5 as well. then add 3 and 4, then the start gate. The key is getting lots of successful turns rather than one and done.