>>514209222
Read manga. I'm being serious.
I had also sort of lost my imagination in a way from years of this hell world as an adult. I noticed it much like you where when I was reading I found myself just absorbing words from the text as if I were studying a technical manual.
I started reading manga and in a short time all that mental magic started flooding back. And no I'm not just imagining anime stuff.
It's like I needed a kickstart to my imagination in this way and the way to do it was to physically have the words associated with somewhat complex images.