Even after doing a Foundation Course I couldn`t draw. So one day I got really fed up and resolved to draw for 20 minutes a day. And I did. For a year.
After a while you begin to draw without conscious effort. You doodle on the shopping list, you illustrate the pad by the phone, you enhance the kid`s notes.... And drawing becomes a pleasure rather than a task.
Try it! If you can learn to write you can learn to draw. And it`s so much fun.