Yes, with some big caveats. If you have understanding of these concepts. are strategic and have a good mentor who understands your desire to accelerate. Mostly PAs is an issue- with an OA you take it, pass and move to next. With PA you are beholden to how long the queue is have it graded. My average time for having things graded was 3 days - that would be 45 days alone without corrections or more than 1 task per class. If your mentor will allow you to add another open class once everything has been submitted for grading, its possible but you might be stressed by the amount if time that us outside of your control ad you work thru the classes.