I'm aphantasic for sure, I think I'm even entirely mind-blind so to speak, I can't imagine smells, tastes, sounds, images, or textures.

I can still dream and I can even recall the details vividly the morning of, but I suspect myself of being on the autism spectrum as I've always been super obsessed with finer details. Besides those recollections aren't in a mental image, it's more so concepts.

When I think of an apple I know the physiology of an apple and thus I can discern the details onto paper (albeit crudely as I'm not artist) but I've always suffered with geometry since rotating a shape in my head is impossible, algebraic translations, flips, etc across the x or y axis are also super difficult for me to grasp. But I can deal with arithmetic easier.

In terms of getting better at it? I'm not really in an environment or situation where I could safely test out hallucinogens, but with my ADHD on top of suspected autism, I really don't think I want to see images in my head. In 2019 I had my deepest dive into depression, and while I was having a 2am panic attack (the peak of my depression I'd say) where I had endless racing thoughts just coming at me from all directions. The "noise" of my own thoughts overpowered everything. If I could imagine sound (and by extension, voices) beyond my own I might have actually gone farther than a 2 second peak of "I want to die".