@Graphics1988 sorry to hear about your hand injury, I hope it heals rapidly.
I hear ya about Billie Jean. I struggled with her for nearly a week before I finally gave up. I wrote a big asterisk on that lesson in the workbook, and moved on.
I was amazed after I finished the course and went back to it. After all those hours of practice, plus now armed with the ability to play from musical notation rather than use tab and knowledge of the finger board, I was able to nail it. You can too!