Hal:
Welcome to iceboating. For you, and anyone else interested in joining the sport, it's a gradual progression from being a first-timer to being race competitive. Two suggestions:
First, connect with some local people or club. I simply googled "Ct. iceboat" and found
http://ciycinfo.blogspot.com/. There are many other clubs in the east region. Go meet them. See their equipment. Sail with them. I'm positive they -- and any other iceboat club -- will welcome you as a new sailor. By hanging with these guys, you'll become connected to a flow of information, especially info as to where to sail. Iceboaters don't wait for good ice at home; they drive to good ice where ever it is.
Secondly, your boat may or may not be highly competitive because today's racing DNs use composite masts. Regardless, it sure sounds sailable. So sail it! Get some time under your belt, and then make your upgrades once you know what works and what doesn't.
Scott
DN 5298