not feeling confident

I've been on usajobs for about 2 months at this point applying to any and all positions I think I could qualify for or sound interesting (investigative, analytical jobs, etc.), however, I'm beginning to lose hope that I'll ever hear back from agencies or get an interview simply because I do not have prior job experience. I'm graduating with a criminal justice degree in May and I know i'm lacking when it comes to this area, but i'm really not looking to work in a local PD or have any sort of law enforcement position. Should I just keep sending in applications hoping something sticks or am I wasting my time?