There is they way you learn, there is the way you think, and there is the way you communicate. Autistic and non autistic people each have a dominant way they learn: visually, auditorily, kinesthetically. Like what TG says about thinking, some people (autistic or not) think in pictures, some in words, some in patterns. People can communicate verbally, in writing, in non verbal gestures or movement, in music. Visual learning is that something goes into your brain by what you see. Different than visual thinking, playing movies in your head. Also different from visual communication, drawing.
I still think one main thing that separates autists from NTs is that NTs can streamline the way they process so all three steps are the same style. Autists seem to learn, think, and communicate in different styles at each step and need to do a lot of extra translating to process. For me, I know I am capable of streamlining, but I get totally distracted along the way by sensory info and can't focus like that since it's not the dominant way my brain wants to work.