Hi Tracy,
I hope you enjoyed what you learned. There are a lot of Sacred Harp singers in the Boston area. Start with Boston Sacred Harp to find some local contacts. Try to get to the open sing if you can.

I hope you were told about & able to get to the New England Sacred Harp Convention last weekend. It was in Vermont.

I'd also like to invite you to the New York State Convention in Barneveld, New York; October 16 & 17. This is 10 miles north of Utica. Details Here

There are many previous threads. Here's a recent one. There are links at the top to others.
I sing Sacred Harp a lot & am co-chair of the New York Convention this year. Like many of us, it's hard to stop me when I get started. I can answer a few questions, but your time frame is pretty close. I think if you find one of the local singers you might do better.