Someone with aphantasia might be able to learn how to conceptualize in a different way, but I don’t think you can train what’s not there, any more than a blind person could train themselves to see. There isn’t a lot of study into it though, and I’ve found it difficult to get solid information on my condition, so perhaps there’s more to learn. Why, for example, do I have a very vivid imagination of sounds? I can imagine an entire song in all of its different instruments as if I could hear it, but I can’t even conceive even a little bit of what it means to see something in my head.

That is so fascinating. I think I understand now, I probably couldn't train myself to do the sound thing. I asked a friend with what you have to tell me what his home looked like growing up and he said it was white. I asked him if he could picture that home when he said it and he told me that no, it was like memorizing times tables, it's just a fact. It blows my mind how our brains work.

As far as collaborating on the art, don't discount the sounds, you could focus on that and your fiance could focus on the visuals. What a cool blend of talents.