Great to hear you focusing on accessibility! I'm on my phone and can't type everything that should be mentioned but I've found that this article helps many developers I've worked with understand what's expected and how to think
https://webaim.org/articles/screenreader_testing/
But overall, yeah, you should be able to test and verify this yourself. User testing is always valuable but they are also users, and are more or less proficient in these programs themselves so feedback can vary a lot.
If you want users, reaching out to organizations or social media groups that deal with impairment in different ways can probably help you find someone who's willing