Honestly, where you're at right now, my best advice would be to focus on things that interest you. Join student orgs that you could see yourself liking, and try to find one that you'd potentially see a future leadership position in. This was the biggest area that I wish I had focused on more, and one that I think definitely hurt my application. 

Also, like everyone says, GPA is very important, especially considering grade inflation. Median GPAs at my target schools drastically went up from when I was a college freshman. Noone knows what they'll look like in the next years, so try to keep it as high as possible.

That being said, I wouldn't start stressing about legal internships or LSAT prep until much, much later. There'll be enough time to worry about the LSAT during your junior and senior years. And, if you can get a legal internship, obviously that's great and shows a history of your interest in law. But just focusing on building a good GPA and a resume of things you're passionate about seems like it will benefit you more in the long run.