Sleeves Challenge: not yet mastered

Unfortunately, I have not yet mastered my sleeves challenge 2021. 🙁 Although I can lift my arms in this dress up to shoulder hight, the sleeves are still too small (although I included an upper-arm-seam which gave my shoulders 3,5cm (about 1,4 inch) additional width) and have unpleasant stress wrinkles.

from Instagram: