I started by removing the shoulder pads. The sleeve had to go, given the weird cuffs and itchy synthetic material, so I cut them off. I took in the sides a bit, from the underarm to the hem, to make more of an a-line shape. Finally, I finished the armholes with black bias tape to match the edge of the neck. Here's the finished product.
I think it will work well under a blazer or on its own, when it gets warmer.
Thanks for reading!