Money. School. Travel. Possible?

I've always wanted to travel and I've always wanted to help people -volunteering is where I've decided to turn. However, I just started college and it's a bitch to pay for. It seems now that if I'm not studying all the time to stay in school, I'm working to attend it. How can I afford to volunteer? I'm guesstimating that if I really wanted to, I'd need to save up about $2000 or more (and learn a little Spanish) in order to do this thing but school is kind of the priority at the moment?

My question is: What do I do!? I don't want to be one of those graduates who has no job, is in a ton of debt, and hasn't done anything in her life she feels is worthwhile..