Looking to get into Security part-time, are my expectations realistic?

I'm very interested in working in the security field part-time to build savings and job experience. Security is especially appealing to me, because it's often worked at night. As a full time college student, much of my morning and afternoon is taken up by class, so working at night would be ideal. What can I do to maximize my chances of getting a job in the security field as a newbie? I already had one interview, but that flopped because my availability wasn't compatible at the time. I had told them I'd only be available on Weekends, but now I realize that I'd be free to work Tuesday, Friday, Saturday, and Sunday. Tips would be appreciated.

Thanks.