Most Helpful Guy
You wait for a while. Wait till the class is over, and then one day you will want to do it again. Or you can just leave something half completed like the outline of the painting and wait until you feel like you want to paint it.
This happens to me with song writing, I will get really excited writing a song, and creating the instruments parts and even the preliminary demo recording, hen I will show it to someone and they will say that there is something about it they do t like. You know like industry professionals want verse chorus verse chorus, and don't really want anything to creative in it, just the basics of what they feel the majority of people will love to hear. So they make all their stupid comments and ruin the feeling of songwriting. But you just have to wait to feel it again and it will come back.
Sometimes the best thing to do is walk away from it, do so. ething else and let your mind get out of that bad area. I find that art can ( if this makes any sense), turn on you and become something that isn't fun.