Making puffy sleeves is difficult, yes I heard your cries. The last time i made puffy sleeves was for my Fujioka Haruhi and Eclair cosplays. And the sleeves were the ones that wasted most of my time and resources (paper, fabric etc)! For haruhi, i think i redid the sleeves 3times :(
I'm no expert at drafting myself so i'm not gonna try to teach you how to. But i found some really great guides online to share. Have fun !
BurdaStyle is a great site with many patterns to share! Check out their step by step guide here !!!!
Another great puffy sleeves pattern tutorial would be Crafty_dame’s here! She explains every step in detail and with many progress photo.
Hope these links helped ^_^!