First, congratulations on your acceptance. I'm sure you worked very hard!
To answer your question, freshman students often look for volunteer opportunities within research. You will have biology professors who conduct research in addition to teaching your class. Ask them if you can volunteer. After getting some research experience consider finding a contact at the Northeastern med school to see if a doctor there has research you can get involved in.
Finally, I'd like to suggest that you add other activities apart from research. While it is important, doing something that you are passionate about matters much more. My partner did no research during his undergrad but started a dance team and choreographed for 3 years. He's graduating this month and starting his psychiatric residency next month.
Best of luck!
Duy recommends the following next steps:
- Seek out contact info for your biology professors
- Email them and ask them to talk about their research
- If research is interesting ask about volunteer opportunities
- Remember to explore other interests/passions you may have