I have no experience or knowledge of your condition, so I’m sorry if anything I say does not apply or isn’t useful. I see you’ve received advice both to read “light novels” and avoid them. I think your best bet is to find something where the physicality or action isn’t key, but dialogue is. And maybe inner dialogue too, but that might be harder to follow at the beginning. I think you’d have a lot of fun reading witty interactions, as they don’t necessarily require you visualize anything specific.