Congrats!!!
I am also a fellow MA agent. Now you should take a look at what your goals are for your real estate career. What niche do you want to specialize in? First Time Home Buyers (FTHB), 2nd/vacation homes, Investment, commercial, etc. Once you think about that, then think about what brokerage can help you gain success in that niche.
I started with a major brokerage and it wasn't a good fit for me to start with. I knew I wanted to deal with investors (rehabs, reos, distressed sales, etc) and my particular office was more high-end homes, almost $100k above the median sales price. Now I am with a brokerage that offers a happy medium.
This is a great market to learn where you want to go in this industry. Figure out what you want your niche to be and find a brokerage that can offer the support to helping you become successful in that niche.