How to get feedback on visually-impaired accessibility for web apps?

Hello! I'm making changes to a web app that involves some aria classes, and I read the docs about how they work, but I'm not real confident in my ability to construct them into something that produces a well-usable experience for someone who's using the app. Is there a good way to get direct feedback from someone who uses a screenreader, or otherwise get some evaluation on whether what I've fumbled together is actually functioning well?