[nivertech]

How many of those 57 who purchased it, are actually using it?

The fact is that most (all?) of the sales come from the same channel/community and that the price is low enough ($27 on average) might indicate that people are simply wanted to support you, or they liked you or your content, not your product. That's the problem with builing in public trend.

You need to reach out to those who purchased, and try to do user interviews with them. Learn how to do user research, i.e. prepare questions, interview script, record them, etc.