Remember how those first few weeks of college were intensely social. You meet a lot of people you'll know the rest of your life. It's a critical time. I recommend:

Social > academic. But they're intertwined, so work hard, and work with others in your core area. Be helpful and smart and humble. Don't worry about your non-core subjects (let others help you).

Don't go nuts with freedom. Go to parties, but drink very little, avoid drugs, don't get caught up in sex. It's fun, but save it for later.

Don't go back home. Don't have a girlfriend back home. Don't have a girlfriend at all, this is a time for lots and lots of friends.

Avoid toxic people.