Amit Sir,
I had the same doubt, but two more scenarios if you can help out with please
1) What if I now hire 2 other people to also teach dance because my students have increased? It is still a proprietorship and I will pay them salary, but does this still count as an "individual"?
2) Under the same proprietorship, I now hire another teacher to teach piano. It is still a proprietorship firm, will that exempt me from paying GST on any piano or dance fees that I collect?
3) Also, is painting considered an "art"? - because it is not mentioned in no.78 from the notification mentioned above, but as a layman, I believe it should be.