How best do you learn? Reading? Listening to a lecture? Taking something apart and putting it back together?
Here’s a link that talks about different learning styles: Edutopia Learning Styles. You can even take a quiz from them that helps you assess yourself as a learner. As you can imagine, no one is ever completely one thing or another, but knowing that you have to movement is important to your learning, might help you understand why you can’t still still and listen to a lecture for very long.
There are lots of other resources for learning about learning styles, spending some time looking around online could be illuminating.