I am a lefty who was taught only by righties! (talk about fun some days!)......I could not live without my Martelli ergonomic rotary cutters (one made specifically for left handed cutting).....,since I was taught only by righties, I cut with both hands (switching when my left gets tired to my right) so I have both of the Martelli cutters. It is better wo watch how your instructor is doing something (she should TAKE CLASSES)...as if you are in front of the instructor looking on, what you see is actually how the leftie would do it.......
I have a good pair of Gingher left-handed shears (which are nice), but I also use regular right handed scissors.....
She should watch several of Jennie Doan's YouTube videos - She is left handed - so those may help too.........