First, I'm wondering when you say "the LPN program begins soon", does that mean you'd be willing to quit college in order to enroll? A normal college courseload in unrelated subjects while studying in an LPN program is not feasible.
You also mentioned a 2-year waiting list to volunteer or shadow a nurse (not sure exactly what that means?) but I've never heard of a waiting list for such a thing. Certainly if you took a 6-week course to become a CNA and get yourself acquainted with the basics of patient care, you could get a part-time job while in school. And you'd see if you even LIKE patient care. I also suppose it must depend greatly on where you live, but $20 as a new grad LPN might not be realistic.
I think the reason you're unsure right now is because you don't know what an LPN does versus what an RN does, and in what settings. You need to have an idea about the limits and expectations of each license, and where and how each is employed before making such a choice. Additionally, saying you'd "love to become a head nurse or something" tells me that you have no real understanding of just what that means. I'm not saying that as a put-down, honestly, just that since "head nurse" is a term you tend to see on TV rather than real-life, your imagery of a nurse might be more media-generated than from reality.
I would suggest meeting with a career counselor at your school or, better yet, one of the instructors/admission counselor for the nursing program (if you have an RN program at your college, start there). If not, meet with the same person at the LPN school. Go to the local hospital and see if you can meet with the nurse recruiter, so he/she can tell you what they look for in a new hire, and whether they hire LPNs. Think about what it is that makes you think nursing would be a good choice for you, and talk about that when you meet these people. They'll be in a better position to see if you're being realistic, or dreaming.