What do you do after getting into a college?

I recently received an acceptance letter from one of my top-choice schools. However, I'm still waiting to hear back from other schools that I've applied to. I'm feeling quite overwhelmed by all the information that I've come across regarding choosing a minor, applying for financial aid, scholarships, and more. I'm not sure what steps I need to take now while I wait for other schools to respond, and what comes next after I commit to a school. I'm also confused about pre-med advising programs.

Can someone please help me understand what I need to do next?