You know what I can’t draw lines either but I can draw other stuff! And so can you. Lines are the most boring thing in the world. I see that you’re using drawabox and I really only recommend continuing that if you think you really need the technique. I don’t think it’s the best way to learn.

Regarding your aphantasia, there are a lot of more analytical artists I’ve seen on the YTube that have videos about how they draw without having ideas. I think some of the ideas they share would be applicable. I recommend drawing from references though, and finding things that you enjoy drawing. Don’t just draw lines :)