The Studio software is actually pretty decent. The installation problem you are having is pretty unusual, which is why I don’t have many solutions to offer.
I found one discussion of the same problem, but I’m not certain exactly how it was resolved. Windows Settings> Accessibility>Text size - set very small?
A somewhat different problem, a blank Setup window, can be caused by a missing or damaged installation of Microsoft Edge Webview 2 Runtime. That should be in your list of installed Apps.
You definitely need to see more of that window and subsequent windows, as the choices cannot be selected with a keyboard.