Hey everyone, so this is my first year skiing I started out with a few lessons and have really begun to pick it up, I rented my skis and boots from a local shop, they gave me skis that are 150cm in length as they were out of anything longer. I am 5'11" and weigh about 145, they also told me these would be easier to learn on. They seems to be fine on most green trails where the terrain is not too steep however I have encountered several situations where the terrain does become steeper and I begin to pick up quite a bit of speed and at this point they begin to shake and become unstable. I also have more difficulty turning at higher speeds when they are like this, it has also caused me to fall at least twice each time I ski.
I was wondering if I would see any improvement with a longer ski? My dad is my height and he uses a ski length of 186cm.