What are the most effective ways to build strong professional connections early on in college, especially if I’m interested in a medical career?

I'm planning to major in a pre-medical area but also want to stay involved in leadership opportunities like research and community outreach. I know internships and networking are important, but I'm not sure where to start when it comes to forming meaningful connections with professors, mentors, and industry professionals early on. Any advice would be appreciated! #Spring25