I see you are in Mass. You could also check out
www.scda1.com and go to one of the area tracks and do something similar to described above. Beginners are required to have instructors ride along. These are great learning events but nothing beats a course like Spring Mountain (I never did Boundarant but I assume similar). Another option is Monticello Motorsports. They are aligned with Spring Mountain and they are in NY. These are closer for us.