You sound pretty normal. A lot of people think they have ADD when they really just haven’t been motivated to focus by what is being offered to them. I do horribly in all classes that don’t directly relate to something I want to learn about, and I most definitely prefer learning through doing. Anyway, I can’t say there is a sequence for sure that targets the cause, but I know of some ideas that are implemented where I study to help kids with ADD a lot.
If you study at a studio already, I’d suggest asking one of the teachers to write you up a sequence that included balance work that you are capable of doing, and work on that practice at home. It would help if they gave you some beginning breathing practices too, such as nadi-shodhana. And whenever you are sitting on the floor or laying down, keep your eyes closed so you can’t see what is going on around you.
A really fun tip is to draw a big black ex or something on the front and back of your hands. Then, go to your regular yoga classes (if it’s the hot room class, use permanent marker), and go through the entire class focusing on your hands. No matter what posture you are in, pay attention to the X’s on the hands. Ask yourself always, 'Where are my hands? Are my hands behind me? Are they above me? Are they on the floor? Are they flat? Does this hurt them? Are my hands stretching?"
This is generally used to help heavy thinkers stay focused on what they are doing, but it is also really good for learning to feel where you are in the posture and learn about your own personal space, strength and capacity when practicing. 
Hope that helps in some way.
