Stop overthinking and just do it. Whats the worst that could happen, and be open minded to change if people don’t like certain aspects of it.

I did experience similar friction when reaching out to people to test my product. I think thats fairly natural for people to not want to help. Its probably due to time and energy it takes to use their product. In the end what i did was have a handful maybe 5 people test actively. Then the people developing the product and myself tested closely for bugs. Hope that helps! Best of luck!