Hi there!
This show is incredibly special to me, and I would love to sell fanart of the show in my own style on my Etsy page! However, I'm unsure of the legality of it. Since the show ended around ten years ago, and merchandise doesn't seem to be in official production anymore, is it okay for me to sell fanart of the characters from K-On? (I wouldn't be stealing an official image and making it into a sticker; it would be hand-drawn by me, however I don't know if that's enough for me to be able to legally sell fanart of this show)
Thank you to anyone who responds!!