Oh, it’s all about the costumes , isn’t it?
But when you are learning, sweating, and focused on the movements, you should be comfortable!
Ideally, you want to wear something with some stretch, breathability, and something in which you won’t worry about sweating !
You can think yoga clothes, T-shirt, crop top, whatever you are happy with, and comfy pants!
Totally personal. Classic indian dance is done barefoot. Bhangra is done barefoot. Belly dance is done both barefoot or with slippers or low heeled shoes in class.
If you need to wear orthotics or just feel better with more foot support, then you can dance in whatever shoes work for you!