Learning to sing or play an instrument online currently sucks because you can't tell if you're improving. Being a music teacher is even worse because their churn increases from the learners losing motivation, leading them to quit paying for classes. However, the issue isn't with the teacher. The course quitting is due to students losing motivation from not improving when practicing alone, where 90% of the progress is made.
Reddit, Facebook, or Smule are the current places to get feedback on your singing or instruments. While these are some big communities, none of these platforms can give you thorough feedback on what you can improve. On top of that, it is a hit or miss every time you post because the number of users in the singing groups is inflated with ghost users.
A Forbes study shows that Americans spend 3.1 hours daily streaming video and 2 hours and 27 minutes on social media daily. There must be a better way to motivate people to take on more active activities rather than spending more than 10% of their week on these passive ones.