Open U. has some good courses and is distance ed http://www.open.ac.uk/new/what-is-the-ou.shtml You could just take courses that interest you for awhile, see how you do?
Many have no entry requirements http://www.open.ac.uk/new/starting-course.shtml and is geared to helping disabled: http://www.open.ac.uk/new/disability-support.shtml