The Green Lanterns go through a lot of training when they first join the Corps. Physical activity without their rings, mental and emotional control in stressful situations. But they also have to take artistic courses if they can. For example if a GL doesn’t have vocal cords they won’t have to be in a singing class but they’ll probably be in a music or dance class. All the artistic expression in the courses will teach you the basic techniques of that art.
Singing- Physical alignment, match pitch, rhythm, tone, vocal care, and more
Dance- Coordination, rhythm, physical and emotional performance, movement control, and more
Percussion- All cultures have their own unique instruments that’s very different from one another. But one instrument that’s mostly used everywhere is one that is designed specifically to keep some form of beat, ie: drums. So they’ll learn how to keep a beat, bit of music theory, tempo, etc…
The rest- Dimensions, simplified course of color theory, proportion, sculpting, artistic expression, how to hear a description of something and sketch it out, diplomacy, speech, etc..
