Do not segregate the experience on your site between sighted users and blind/visually impaired users. Design your site inclusively and make the experience robust for all users, that way you can manage content and updates for only one experience, not multiple ones where you may forget things here or there or burn out on keeping one experience updated along with the others. Plus, think about it. If the experience will be fundamentally different between sighted and blind users farther than navigating via screen reader, how will we relate the experience and info with the sighted users?

I think there is an optional flag in the browser query string, but a lot of blind people will turn it off. THEY would argue, and rightly so, that the web should be accessible to all, without having to declare your disability for a better experience.

You can hide page elements for the sighted whilst making them visible to screen readers. It's very rare you'll need to segment your audience so deeply.