Question about app icons

Hi, I'm blind, and I've developed an app that I wish to put up on the App Store. However, aside from visual testing issues, I have encounter another, even bigger issue: app icons. How can I design an app icon for my app? I know there are people we can pay to d it for us, but honestly I don't think the fact that I'm blind should mean I have to pay for a product others who are sighted could do on their own. I'd love to use some sort of design software, but I can't. Is there a way to do this for free, or any tips you may have for a family member helping with the design? Thank you.

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