Linda Ann’s Answer
Hi Alexandra, WOW....it's great that you are thinking ahead about gaining research experience. I'm operating under the assumption that your long-term goals include graduate school in psychology. Research experience will definitely help you with this goal achievement.
Since you are a freshman, you probably don't yet have a sufficient number of courses in psychology (unless you took courses while you were in high school) to help guide you with the type of research that you might be interested in, other than neuroscience. Identify the professors at your university who are engaged in the kind of research that resonates with you; you can do that research by going to the Psychology Department's webpage and reviewing the narratives that are posted there about each faculty member.
Then, have a conversation with your academic advisor, who hopefully is a psychology faculty member, to bounce some of your ideas off of her or him. That is, identify specifically the faculty members with whom you think you would enjoy working because of the research they are engaged in. Ask your advisor for feedback on your ideas. Ask your advisor if s/he would be willing to introduce you to this faculty member....or at least make a phone call or email on your behalf. I suggest this, as I know that "cold calling" someone you haven't yet met can be intimidating. Hopefully, your academic advisor will set the stage for you for having this conversation with several faculty members at your institution.
When you are ready to have that conversation with a faculty member whose lab you would like to work in, be sure that you have questions prepared in advance for her/him. Having those questions will demonstrate to the professor that you are serious about your desire to volunteer in their lab. Be prepared to describe to that professor what your interests are currently and your long term career goals.
Volunteering in someone's research laboratory provides invaluable experience to undergraduates. It's not unusual for that volunteer experience to turn into a paid, part-time job while you are in school.
I wish you the best. GOOD LUCK.