Orca is hardly ever used, however, if that's what you have available, trying it is still miles ahead over not doing anything. There's a lot of things you could

Orca is hardly ever used, however, if that's what you have available, trying it is still miles ahead over not doing anything. There's a lot of things you could do to make an OK experience better, but the highest bang for the buck is making a broken experience at least work - and any screen reader will be able to help you discover that some part of your app is completely unreachable using the keyboard when navigating using the screen reader.